| book | question number | deck | answer | question | A | B | C | D | illustration |
| 3 | 1 | D | B | Unlighted, red and green, horizontally-banded buoys with the topmost band red ____________. | are cylindrical in shape and called can buoys | are conical in shape and called nun buoys | may either be cylindrical or conical since the shape has no significance | are triangular in shape to indicate that it may not be possible to pass on either side of the buoy | |
| 3 | 2 | D | D | On an isomagnetic chart, the line of zero variation is the __________. | zero variation line | isogonic line | variation line | agonic line | |
| 3 | 4 | D | B | Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are _____________. | accurate only in the Polar regions | accurate electronic servomechanisms | hand operated | accurate only if the vessel is underway | |
| 3 | 5 | D | B | A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line? | 0900, 24 January | 2100, 24 January | 2100, 25 January | 0900, 26 January | |
| 3 | 6 | D | B | Wind velocity varies ______________. | directly with the temperature of the air mass | directly with the pressure gradient | inversely with the barometric pressure | inversely with the absolute humidity | |
| 3 | 7 | D | C | The period at high or low tide during which there is no change in the height of the water is called the __________. | range of the tide | plane of the tide | stand of the tide | reversing of the tide | |
| 3 | 8 | D | C | When you are steering on a pair of range lights and find the upper light is above the lower light you should __________. | come left | come right | continue on the present course | wait until the lights are no longer in a vertical line | |
| 3 | 9 | D | A | When displayed under a single-span fixed bridge, red lights indicate _____________________. | the channel boundaries | that vessels must stop | the bridge is about to open | that traffic is approaching from the other side | |
| 3 | 10 | D | A | The wind at Frying Pan shoals has been northwesterly at an average velocity of 22 knots. The predicted set and drift of the rotary current are 125° at 0.6 knot. What current should you expect? | 119° at 0.9 knot | 172° at 1.1 knots | 225° at 0.6 knot | 340° at 0.4 knot | |
| 3 | 11 | D | B | A buoy having red and green horizontal bands would have a light characteristic of _____________. | interrupted quick flashing | composite group flashing | Morse (A) | quick flashing | |
| 3 | 12 | D | D | Lines on a chart which connect points of equal magnetic variation are called _____________. | magnetic latitudes | magnetic declinations | dip | isogonic lines | |
| 3 | 14 | D | A | You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded? | Test the electrical gain to the thermograph pens | Set the zone pen on the correct quadrant | Line the course pen up on the exact heading of the ship | Adjust the chart paper to indicate the correct time | |
| 3 | 15 | D | C | What is the length of a nautical mile? | 1,800 meters | 2,000 yards | 6,076 feet | 5,280 feet | |
| 3 | 16 | D | C | The direction of the surface wind is _____________________. | directly from high pressure toward low pressure | directly from low pressure toward high pressure | from high pressure toward low pressure deflected by the earth's rotation | from low pressure toward high pressure deflected by the earth's rotation | |
| 3 | 17 | D | A | "Stand" of the tide is that time when _____________________. | the vertical rise or fall of the tide has stopped | slack water occurs | tidal current is at a maximum | the actual depth of the water equals the charted depth | |
| 3 | 18 | D | B | A vessel's position should be plotted using bearings of ________________. | buoys close at hand | fixed known objects on shore | buoys at a distance | All of the above | |
| 3 | 19 | D | D | You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________. | the fixed, green light starts to flash | the amber light changes to green | the red light is extinguished | the red light changes to green | |
| 3 | 20 | D | A | You are underway on course 050‚ T and your maximum speed is 12 knots. The eye of a hurricane bears 120‚ T, 110 miles from your position. The hurricane is moving towards 285‚ T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be | 77 miles | 82 miles | 87 miles | 93 miles | |
| 3 | 21 | D | B | Which buoy is NOT numbered? | Green can buoy | Preferred-channel buoy | Red lighted buoy | Green gong buoy | |
| 3 | 22 | D | A | Charts showing the coast of Mexico are produced by the United States _____________. | National Imagery and Mapping Agency | Coast Guard | Naval Observatory | National Ocean Service | |
| 3 | 24 | D | D | When the gyropilot is used for steering, what control is adjusted to compensate for varying sea conditions? | Rudder control | Sea control | Lost motion adjustment | Weather adjustment | |
| 3 | 25 | D | A | You are in LONG 144‚ E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are ________________. | 2200, 5 February | 2300, 5 February | 1700, 6 February | 1800, 6 February | |
| 3 | 26 | D | D | Wind direction may be determined by observing all of the following EXCEPT ______________. | low clouds | waves | whitecaps | swells | |
| 3 | 27 | D | A | Spring tides are tides that _________________. | have lows lower than normal and highs higher than normal | have lows higher than normal and highs lower than normal | are unpredictable | occur in the spring of the year | |
| 3 | 28 | D | C | When using a buoy as an aid to navigation which of the following should be considered? | The buoy should be considered to always be in the charted location. | If the light is flashing, the buoy should be considered to be in the charted location. | The buoy may not be in the charted position. | The buoy should be considered to be in the charted position if it has been freshly painted. | |
| 3 | 29 | D | C | You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by _______. | a quick flashing red or green aid to navigation | a steady blue light in the center of the span | 3 white lights in a vertical line in the center of the span | a flashing green light in the center of the span | |
| 3 | 30 | D | A | When taking an amplitude, the Sun's center should be observed on the visible horizon when ___________. | in high latitudes | the Sun is near or at a solstice | the declination is of a different name from the latitude | the Sun's declination is at or near 0° | |
| 3 | 31 | D | A | When approaching a preferred-channel buoy, the best channel is NOT indicated by the _____________. | light characteristic | color of the uppermost band | shape of an unlighted buoy | color of the light | |
| 3 | 32 | D | B | The datum used for soundings on charts of the AtlanticCoast of the United States is mean _____. | low water | lower low water | high water springs | high water | |
| 3 | 34 | D | B | The Local Notice to Mariners is usually published _________. | daily | weekly | monthly | semiannually | |
| 3 | 35 | D | D | You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT? | 1200, 3 July | 2000, 3 July | 1200, 2 July | 2000, 2 July | |
| 3 | 36 | D | B | A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is a ______________. | Papagayo | fall wind | foehn | williwaw | |
| 3 | 37 | D | B | What does the term "tide" refer to? | Horizontal movement of the water | Vertical movement of the water | Mixing tendency of the water | Salinity content of the water | |
| 3 | 38 | D | D | When navigating a vessel, you _______________. | can always rely on a buoy to be on station | can always rely on a buoy to show proper light characteristics | should assume a wreck buoy is directly over the wreck | should never rely on a floating aid to maintain its exact position | |
| 3 | 39 | D | A | Civil twilight begins at 1910 zone time on 20 July 1981. Your DR position at that time is LAT 22°16' N, LONG 150°06' W. Which statement concerning the planets available for evening sights is TRUE? | Venus will have a westerly meridian angle. | Mars will set about one hour after the Sun sets. | Mars, Venus, Jupiter, and Saturn will be above the horizon. | Sights of Saturn, Jupiter, and Venus will yield a good three-line-of-position fix. | |
| 3 | 40 | D | C | The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current? | Billingsport | Marcus Hook | Mile 63 | Mile 52 | |
| 3 | 41 | D | B | Mean high water is the reference plane used for _____. | all vertical measurements | heights above water of land features such as lights | soundings on the East and West Coasts | water depths on the East Coast only | |
| 3 | 42 | D | C | The datum used for soundings on charts of the the EastCoast of the United States is _____. | mean low water springs | mean low water | mean lower low water | half tide level | |
| 3 | 43 | D | C | A buoy with a composite group-flashing light indicates a(n) ________. | anchorage area | fish net area | bifurcation | dredging area | |
| 3 | 44 | D | A | The speed of sound through ocean water is nearly always _________. | faster than the speed of calibration for the fathometer | the same speed as the speed of calibration for the fathometer | slower than the speed of calibration for the fathometer | faster than the speed of calibration for the fathometer, unless the water is very warm | |
| 3 | 45 | D | A | The navigator aboard a ship at approximately 165‚ E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation? | 03-25-04, 21 September | 02-25-04, 21 September | 01-25-04, 21 September | 01-25-04, 20 September | |
| 3 | 46 | D | A | What wind reverses directions seasonally? | Monsoon winds | Hooked trades | Jet stream | Secondary winds | |
| 3 | 47 | D | C | The range of tide is the __________________. | distance the tide moves out from the shore | duration of time between high and low tide | difference between the heights of high and low tide | maximum depth of the water at high tide | |
| 3 | 48 | D | D | When should a navigator rely on the position of floating aids to navigation? | During calm weather only | During daylight only | Only when inside a harbor | Only when fixed aids are not available | |
| 3 | 49 | D | A | While steering a course of 150° T, you wish to observe a body for a latitude check. What would the azimuth have to be? | 000° T | 090° T | 150° T | 240° T | |
| 3 | 50 | D | B | The difference between the heights of low and high tide is the __________. | period | range | distance | depth | |
| 3 | 51 | D | D | In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark _____________. | channels for shallow draft vessels | general anchorage areas | fishing grounds | junctions or bifurcations | |
| 3 | 52 | D | B | The reference datum used in determining the heights of land features on most charts is _____. | mean sea level | mean high water | mean low water | half-tide level | |
| 3 | 54 | D | B | The elapsed time of a fathometer signal (from sound generation to the return of the echo) is 1 second. What is the depth of the water at the point sounded? | 400 feet | 400 fathoms | 800 feet | 800 fathoms | |
| 3 | 55 | D | D | Your longitude is 179°59' W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179°59' E longitude. Your LMT and date are _____________. | 00h 02m on the 4th | 00h 02m on the 5th | 23h 50m on the 5th | 00h 02m on the 6th | |
| 3 | 56 | D | A | A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is called ________. | Tehuantepecer | Papagayo | Norther | Pampero | |
| 3 | 57 | D | B | The height of tide is the ___________________. | depth of water at a specific time due to tidal effect | difference between the depth of the water and the area's tidal datum | difference between the depth of the water and the high water tidal level | difference between the depth of the water at high tide and the depth of the water at low tide | |
| 3 | 58 | D | D | You should plot your dead reckoning position _____. | at every course change | hourly | at every speed change | All of the above are correct. | |
| 3 | 59 | D | D | For navigational purposes, each great circle on the Earth has a length of ______________. | 3,600 miles | 5,400 miles | 12,500 miles | 21,600 miles | |
| 3 | 60 | D | A | The predicted time that the ebb begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1630 and turn for 12 knots, at what point will you lose the flood current? | New Castle | Reedy Island | Mile 44 | Ship John Shoal Lt. | |
| 3 | 61 | D | A | Red lights may appear on _____________. | horizontally banded buoys | vertically striped buoys | yellow buoys | spherical buoys | |
| 3 | 62 | D | B | Charted depth is the _____. | vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide | vertical distance from the chart sounding datum to the ocean bottom | average height of water over a specified period of time | average height of all low waters at a place | |
| 3 | 64 | D | C | Mean lower low water is the reference plane used for _____. | all vertical measurements | heights above water for lights, mountains, etc. | soundings on the U.S. east and west coasts | water depths on the U.S. east coast only | |
| 3 | 65 | D | C | The LMT of LAN is 1210. Your longitude is 70°30' E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? | 1842 | 1652 | 728 | 652 | |
| 3 | 66 | D | A | What will a veering wind do? | Change direction in a clockwise manner in the Northern Hemisphere | Circulate about a low pressure center in a counterclockwise manner in the Northern Hemisphere | Vary in strength constantly and unpredictably | Circulate about a high pressure center in a clockwise manner in the Southern Hemisphere | |
| 3 | 67 | D | A | What is the definition of height of tide? | The vertical distance from the tidal datum to the level of the water at any time | The vertical difference between the heights of low and high water | The vertical difference between a datum plane and the ocean bottom | The vertical distance from the surface of the water to the ocean floor | |
| 3 | 68 | D | D | A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) ____________. | dead-reckoning position | estimated position | fix | running fix | |
| 3 | 69 | D | A | The parallax angle will vary the most with the time of year for ______________. | Venus | Jupiter | Saturn | Polaris | |
| 3 | 70 | D | C | The station located at "A" is the __________________. | on station | off station | master station | secondary station | See illustration number(s): D001NG |
| 3 | 71 | D | A | A preferred-channel buoy may be ___________. | lettered | spherical | showing a white light | All of the above | |
| 3 | 72 | D | B | The datum from which the predicted heights of tides are reckoned in the tide tables is _____. | mean low water | the same as that used for the charts of the locality | the highest possible level | given in table three of the tide tables | |
| 3 | 74 | D | D | When operated over a muddy bottom, a fathometer may indicate ________. | a shallow depth reading | a zero depth reading | no depth reading | two depth readings | |
| 3 | 75 | D | A | The zone time of LAN is 1152. Your longitude is 73°15' E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? | 652 | 659 | 1852 | 1859 | |
| 3 | 76 | D | B | In the Northern Hemisphere, a wind that shifts counterclockwise is a ______________. | veering wind | backing wind | reverse wind | chinook wind | |
| 3 | 77 | D | B | When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called ______________. | diurnal | semidiurnal | solar | mixed | |
| 3 | 78 | D | B | A single line of position combined with a dead-reckoning position results in a(n) _________________. | assumed position | estimated position | fix | running fix | |
| 3 | 79 | D | B | The rate of increase in hour angle is the slowest for _______________. | the Sun | the Moon | Mars | Mercury | |
| 3 | 80 | D | C | When the moon is at first quarter or third quarter phase, what type of tides will occur? | Apogean | Perigean | Neap | Spring | |
| 3 | 81 | D | A | A buoy with a composite group-flashing light indicates a(n) _________. | bifurcation | fish net area | anchorage area | dredging area | |
| 3 | 82 | D | D | On the west coast of North America, charted depths are taken from ____. | high water | mean tide level | mean low water | mean lower low water | |
| 3 | 84 | D | A | When using an echo sounder in deep water, it is NOT unusual to __________. | receive a strong return at about 200 fathoms (366 meters) during the day, and one nearer the surface at night | receive a first return near the surface during the day, and a strong return at about 200 fathoms (366 meters) at night | receive false echoes at a constant depth day and night | have to recalibrate every couple of days due to inaccurate readings | |
| 3 | 85 | D | D | Your longitude is 179°59' W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59' E longitude. Your LMT and date is now ___________. | 00h 02m on the 4th | 00h 02m on the 5th | 23h 50m on the 5th | 00h 02m on the 6th | |
| 3 | 86 | D | B | A weather forecast states that the wind will commence backing. In the Northern Hemisphere, this would indicate that it will ________________. | shift in a clockwise manner | shift in a counterclockwise manner | continue blowing from the same direction | decrease in velocity | |
| 3 | 87 | D | A | A tide is called diurnal when _____________. | only one high and one low water occur during a lunar day | the high tide is higher and the low tide is lower than usual | the high tide and low tide are exactly six hours apart | two high tides occur during a lunar day | |
| 3 | 88 | D | C | Which position includes the effects of wind and current? | Dead reckoning position | Leeway position | Estimated position | Set position | |
| 3 | 89 | D | B | The GHA of the first point of Aries is 315° and the GHA of a planet is 150°. What is the right ascension of the planet? | 7 hours | 11 hours | 19 hours | 23 hours | |
| 3 | 90 | D | B | When the moon is new or full, which type of tides occur? | Neap | Spring | Diurnal | Apogean | |
| 3 | 91 | D | D | A preferred-channel buoy will show a ___________. | white light whose characteristic is Morse (A) | group-occulting white light | composite group-flashing (2 + 1) white light | composite group-flashing (2 + 1) red or green light | |
| 3 | 92 | D | C | When utilizing a Pacific Coast chart, the reference plane of soundings is _____. | mean low water springs | mean low water | mean lower low water | lowest normal low water | |
| 3 | 94 | D | A | When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom? | Echoes from a deep scattering layer | Echoes from schools of fish | Multiple returns reflected from the bottom to the surface and to the bottom again | Poor placement of the transducer on the hull | |
| 3 | 95 | D | C | The difference in local time between an observer on 114° W and one on 119° W is _____________. | 1.25 minutes | 5 minutes | 20 minutes | 75 minutes | |
| 3 | 96 | D | A | A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will _____________. | shift in a clockwise manner | shift in a counterclockwise manner | continue blowing from the same direction | increase in velocity | |
| 3 | 97 | D | B | The lunar or tidal day is ___________. | about 50 minutes shorter than the solar day | about 50 minutes longer than the solar day | about 10 minutes longer than the solar day | the same length as the solar day | |
| 3 | 98 | D | B | A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) ________. | dead reckoning position | estimated position | fix | None of the above | |
| 3 | 99 | D | B | You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter _______. | smoother seas and warmer water | steeper waves, closer together | long swells | cirrus clouds | |
| 3 | 100 | D | B | You are underway on course 050‚ T and your maximum speed is 12 knots. The eye of a hurricane bears 080‚ T, 100 miles from your position. The hurricane is moving towards 265‚ T at 22 knots. What course should you steer at 12 knots to have the maximum CPA? | 219‚ | 208‚ | 199‚ | 190‚ | |
| 3 | 101 | D | C | A lighted preferred-channel buoy may show a _____. | fixed red light | Morse (A) white light | composite group-flashing light | yellow light | |
| 3 | 102 | D | C | Which statement about a DMAHTC chart with stock no. 23BHA23433 is TRUE? | This is a non-navigational or special purpose chart. | It is not included in the portfolio. | It is a chart of an area in subregion 23. | It depicts a major portion of an ocean. | |
| 3 | 104 | D | B | What should you apply to a fathometer reading to determine the depth of water? | Subtract the draft of the vessel. | Add the draft of the vessel. | Subtract the sea water correction . | Add the sea water correction. | |
| 3 | 105 | D | D | If the GMT is 1500, the time at 75° E longitude is ________. | 1000 | 1500 | 1700 | 2000 | |
| 3 | 106 | D | D | A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a ________. | foehn | chinook | land breeze | sea breeze | |
| 3 | 107 | D | D | The average height of the surface of the sea for all stages of the tide over a 19 year period is called ___________. | mean high water | mean low water | half-tide level | mean sea level | |
| 3 | 108 | D | C | A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) ___________. | dead-reckoning position | estimated position | fix | running fix | |
| 3 | 109 | D | C | While proceeding along the Norwegian coast on course 039° T, you sight the black-yellow-black banded buoy shown bearing 053° T. What action should you take? | Alter course to 053° and leave the buoy close aboard on either side | Maintain course | Alter course to 060° and ensure that the true bearings decreases | Alter course to port to rapidly open the bearing to the right | See illustration number(s): DO21NG |
| 3 | 110 | D | C | A millibar is a unit of _____________. | humidity | precipitation | pressure | temperature | |
| 3 | 111 | D | A | Green lights may appear on _______________. | horizontally banded buoys | vertically striped buoys | yellow buoys | spherical buoys | |
| 3 | 112 | D | D | Which chart number indicates a DMAHTC chart designed for inshore coastwise navigation? | LCORR5868 | COMBT800564 | 17XHA17365 | 16ACO16595 | |
| 3 | 114 | D | B | All echo-sounders can measure the ________. | actual depth of water | actual depth of water below keel | average depth from waterline to hard bottom | average depth of water to soft bottom | |
| 3 | 115 | D | B | The date is the same all over the world at ________________. | 0000 GMT | 1200 GMT | 0000 LMT for an observer at 90° E longitude | no time | |
| 3 | 116 | D | C | Which wind results from a land mass cooling more quickly at night than an adjacent water area? | Coastal breeze | Sea breeze | Land breeze | Mistral | |
| 3 | 117 | D | D | Mean high water is the average height of __________. | the higher high waters | the lower high waters | the lower of the two daily tides | all high waters | |
| 3 | 118 | D | C | What describes an accurate position that is NOT based on any prior position? | Dead-reckoning position | Estimated position | Fix | Running fix | |
| 3 | 119 | D | C | While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown. Your course is 039° T, and the buoy bears 053° T. What action should you take? | Alter course to 053° T and pass the buoy close aboard on either side | Alter course to 060° and ensure that the bearings decrease | Maintain course and ensure that the bearings increase | Alter course towards the buoy and leave the buoy well clear on either side | See illustration number(s): DO20NG |
| 3 | 120 | D | A | You are underway on course 050‚ T and your maximum speed is 13 knots. The eye of a hurricane bears 100‚ T, 120 miles from your position. The hurricane is moving towards 275‚ T at 25 knots. If you maneuver at 13 knots to avoid the hurricane, what could be | 72 miles | 78 miles | 83 miles | 89 miles | |
| 3 | 121 | D | D | A safe water mark may be _____________. | vertically striped | spherical | showing a white light | All of the above | |
| 3 | 122 | D | A | The subregions of the United States Gulf and East Coasts are numbered 11, 12, and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast? | 11250 | 18411 | 21228 | 17136 | |
| 3 | 123 | D | A | If the radio signal ground wave extends out for less distance than the minimum skywave distance, there is an area in which no signal is received. This is called the ______. | skip zone | blackout zone | diffraction zone | shadow zone | |
| 3 | 124 | D | B | An electronic depth finder operates on the principle that ________. | radio signals reflect from a solid surface | sound waves travel at a constant speed through water | radar signals travel at a constant speed through water | pressure increases with depth | |
| 3 | 125 | D | B | The GMT is 0445 and your zone description is +1. Your zone time is _____________. | 445 | 345 | 545 | 1545 | |
| 3 | 126 | D | C | A katabatic wind blows ______________. | up an incline due to surface heating | in a circular pattern | down an incline due to cooling of the air | horizontally between a high and a low pressure area | |
| 3 | 127 | D | C | Mean low water is the average height of ___________. | the surface of the sea | high waters and low waters | all low waters | the lower of the two daily low tides | |
| 3 | 128 | D | A | A position obtained by applying only your vessel's course and speed to a known position is a ________. | dead-reckoning position | fix | probable position | running fix | |
| 3 | 129 | D | B | In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from _____. | the equator to the elevated pole | your horizon to your zenith | your zenith to the elevated pole | the geographical position of the Sun to the elevated pole | |
| 3 | 130 | D | B | The distance between the surface of the water and the tidal datum is the ____________. | range of tide | height of tide | charted depth | actual water depth | |
| 3 | 131 | D | D | A vertically-striped buoy may be ______________. | striped black and green | striped black and yellow | lighted with a red light | lighted with a white light | |
| 3 | 132 | D | B | The value of sixty nautical miles per degree of geodetic latitude is most correct at __________. | the equator | latitude 45° | the poles | all latitudes | |
| 3 | 134 | D | B | The recording fathometer produces a graphic record of the ________. | bottom contour only up to depths of 100 fathoms | depth underneath the keel against a time base | contour of the bottom against a distance base | depth of water against a distance base | |
| 3 | 135 | D | C | The standard meridian for the time zone +1 is _____________. | 0° | 7 1/2° W | 15° W | 7 1/2° E | |
| 3 | 136 | D | C | Which Beaufort force indicates a wind speed of 65 knots? | Beaufort force 0 | Beaufort force 6.5 | Beaufort force 12 | Beaufort force 15 | |
| 3 | 137 | D | D | Priming of the tides occurs ____________. | at times of new and full Moon | when the Earth, Moon, and Sun are lying approximately on the same line | when the Moon is between first quarter and full and between third quarter and new | when the Moon is between new and first quarter and between full and third quarter | |
| 3 | 138 | D | B | The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the _____________. | DR plot | track line | heading | estimated course | |
| 3 | 139 | D | C | What is the geographic longitude of a body whose GHA is 215°15'? | 35°15' W | 35°15' E | 144°45' E | 144°45' W | |
| 3 | 140 | D | C | You are underway on course 050° T and your maximum speed is 12 knots. The eye of a hurricane bears 080° T, 100 miles from your position. The hurricane is moving towards 265° T at 22 knots. If you maneuver at 12 knots to avoid the hurricane, what could be | 76 miles | 69 miles | 63 miles | 56 miles | |
| 3 | 141 | D | C | You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133° T, and bears 042° T, 105 miles from you. What is the time to intercept if you make 10 knots? | 12h 30m | 12h 44m | 13h 00m | 13h 22m | |
| 3 | 142 | D | B | Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals? | Approach charts | General charts | Sailing charts | Coast charts | |
| 3 | 143 | D | D | Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic? | Isophase | Quick flashing | Long flashing | Group Flashing (2 + 1) | |
| 3 | 144 | D | B | In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) ________________. | transmitter | transducer | transceiver | amplifier | |
| 3 | 145 | D | D | The standard time meridian for zone description -1 is _____. | 0° | 7 1/2° W | 7 1/2° E | 15° E | |
| 3 | 146 | D | A | What change in the wind could be expected at position D if the low was moving northeasterly? | Decreasing and veering to the west | Decreasing and backing to the north | Increasing and veering to the southwest | Increasing and backing to the east | See illustration number(s): D049NG |
| 3 | 147 | D | C | Which statement is TRUE concerning equatorial tides? | They occur when the Sun is at minimum declination north or south. | They occur when the Moon is at maximum declination north or south. | The difference in height between consecutive high or low tides is at a minimum. | They are used as the basis for the vulgar establishment of the port. | |
| 3 | 148 | D | B | When possible, a DR plot should always be started from where? | Any position | A known position | An assumed position | None of the above | |
| 3 | 149 | D | B | You are underway on course 050‚ T and your maximum speed is 13 knots. The eye of a hurricane bears 100‚ T, 120 miles from your position. The hurricane is moving towards 275‚ T at 25 knots. What course should you steer at 13 knots to have the maximum CPA? | 339‚ | 333‚ | 326‚ | 320‚ | |
| 3 | 150 | D | B | An alternating light ____________. | shows a light with varying lengths of the lighted period | shows a light that changes color | marks an alternate lesser-used channel | is used as a replacement for another light | |
| 3 | 151 | D | B | Under the U.S. Aids to Navigation System, spherical buoys may be ______________. | numbered | lettered | lighted | All of the above | |
| 3 | 152 | D | B | A chart with a natural scale of 1:160,000 is classified as a _____________. | sailing chart | general chart | coast chart | harbor chart | |
| 3 | 153 | D | C | The line extending beyond the stations at A and B is referred to as the _____________. | slave line | zero line | baseline extension | centerline | See illustration number(s): D004NG |
| 3 | 154 | D | D | Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading? | Salinity of water | Temperature of water | Atmospheric pressure | Type of bottom | |
| 3 | 155 | D | A | The velocity of the current in large coastal harbors is ___________________. | predicted in Tidal Current Tables | unpredictable | generally constant | generally too weak to be of concern | |
| 3 | 156 | D | A | In reading a weather map, closely spaced pressure gradient lines would indicate _____________________. | high winds | high overcast clouds | calm or light winds | fog or steady rain | |
| 3 | 157 | D | A | Tropic tides are caused by the __________________. | Moon being at its maximum declination | Moon crossing the equator | Sun and Moon both being near 0° declination | Moon being at perigee | |
| 3 | 158 | D | C | Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be _______. | with you at 10 knots | against you at 10 knots | slack | with you at 2 knots | |
| 3 | 159 | D | B | The apparent wind can be zero when the true wind is from_____. | ahead and equal to the ship's speed | astern and equal to the ship's speed | ahead and equal to twice the ship's speed | astern and equal to twice the ship's speed | |
| 3 | 161 | D | D | How is a safe water mark, that can be passed close aboard on either side, painted and lighted? | Black and white stripes with an interrupted quick flashing light | Black and red stripes with a Morse (A) light | Black and red stripes with an interrupted quick flashing light | Red and white stripes with a Morse (A) light | |
| 3 | 162 | D | C | A chart with a scale of 1:80,000 would fall into the category of a _____. | sailing chart | general chart | coastal chart | harbor chart | |
| 3 | 163 | D | B | How many fixed objects are needed to plot a running fix? | None | One | Two | Three | |
| 3 | 164 | D | A | The part of a sextant mounted directly over the pivot of the index arm is the _________________. | index mirror | horizon glass | micrometer drum | telescope | |
| 3 | 165 | D | D | On 6 July 1981, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time? | It is 1000, 5 July. | It is 1000, 6 July. | It is 2200, 7 July. | It is 1000, 7 July. | |
| 3 | 166 | D | D | On the pole side of the high pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east and are known as the __________. | geostrophic winds | doldrums | horse latitudes | prevailing westerlies | |
| 3 | 167 | D | C | When the Moon's declination is maximum north, which of the following will occur? | Mixed-type tides | Higher high tides and lower low tides | Tropic tides | Equatorial tides | |
| 3 | 168 | D | C | Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing? | A following current at 2.0 knots | A head current of 2.0 knots | A following current of 0.9 knot | A head current of 0.9 knot | |
| 3 | 169 | D | A | You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot? | 0939 to 0957 | 0943 to 0953 | 0844 to 0852 | 0348 to 0356 | |
| 3 | 170 | D | A | Which of the buoy symbols in illustration D032NG indicates a safe water mark? | D | C | B | A | |
| 3 | 171 | D | A | Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks _________________. | safe water | a fish trap area | a hazard to navigation | a bifurcation in the channel | |
| 3 | 172 | D | A | A chart with a scale of 1:45,000 is a _____. | harbor chart | coast chart | general chart | sailing chart | |
| 3 | 173 | D | D | When using GPS (Global Positioning System) you may expect your position to be accurate 95% of the time to within a radius of __________. | 10 meters | 20 meters | 50 meters | 100 meters | |
| 3 | 174 | D | D | The position labeled D is a(n) ___________________. | fix | running fix | estimated position | dead reckoning position | See illustration number(s): DO51NG |
| 3 | 175 | D | C | On 5 July 1981, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time? | It is 1200, 4 July. | It is 1200, 5 July. | It is 1200, 6 July. | It is 2400, 6 July. | |
| 3 | 176 | D | C | Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent? | Subpolar easterlies | Northeast trades | Prevailing westerlies | Dominant southwesterly flow | |
| 3 | 177 | D | B | How many high waters usually occur each day on the East Coast of the United States? | One | Two | Three | Four | |
| 3 | 178 | D | A | You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set? | Head your vessel slightly to the right | Head your vessel slightly to the left | Decrease your speed | Increase your speed | |
| 3 | 179 | D | C | You are proceeding up a channel at night. It is marked by a range which bears 185° T. You steady up on a compass course of 180° with the range in line dead ahead. This indicates that you(r) _________________. | must come right to get on the range | course is in error | compass has some easterly error | are being affected by a southerly current | |
| 3 | 180 | D | A | What is a lighted safe water mark fitted with to aid in its identification? | A spherical topmark | Red and white retroreflective material | A sequential number | A red and white octagon | |
| 3 | 181 | D | B | Which navigational mark may only be lettered? | An unlighted, green, can buoy | A spherical buoy | A red buoy | A port side dayshape | |
| 3 | 182 | D | C | The scale on a chart is given as 1:5,000,000. This means that _____. | 1 inch is equal to 5,000 inches on the Earth's surface | 1 nautical mile on the chart is equal to 5,000 inches on the Earth's surface | 1 inch is equal to 5,000,000 inches on the Earth's surface | 1 nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface | |
| 3 | 184 | D | D | When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads ___________. | 22 1/2° | 45° | 60° | 90° | |
| 3 | 185 | D | D | A ship is in longitude 54°00' W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time? | 45°00' W | 52°30' W | 60°00' W | 67°30' W | |
| 3 | 186 | D | C | In the doldrums you will NOT have ___________. | high relative humidity | frequent showers and thunderstorms | steep pressure gradients | frequent calms | |
| 3 | 187 | D | D | Which statement is TRUE concerning apogean tides? | They occur only at quadrature. | They occur when the Moon is nearest the Earth. | They cause diurnal tides to become mixed. | They have a decreased range from normal. | |
| 3 | 188 | D | B | Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately ________. | 286° | 254° | 106° | 016° | |
| 3 | 189 | D | C | While steering a course of 150° T, you wish to observe the Sun for a speed check. What would the azimuth have to be? | 060° T | 090° T | 150° T | 240° T | |
| 3 | 190 | D | A | You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter ________. | steeper waves, closer together | long swells | cirrus clouds | smoother seas and warmer water | |
| 3 | 191 | D | C | Safe water buoys may show ONLY_______________. | flashing red lights | flashing green lights | white lights | yellow lights | |
| 3 | 192 | D | C | The description "Racon" beside an illustration on a chart would mean a _____. | radar conspicuous beacon | circular radiobeacon | radar transponder beacon | radar calibration beacon | |
| 3 | 194 | D | A | The horizon glass of a sextant is _______________. | silvered on its half nearer the frame | mounted on the index arm | between the horizon and the shade glasses | All of the above | |
| 3 | 195 | D | A | The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2° W of the central meridian of your time zone, when will the apparent Sun cross your meridian? | 1216 | 1208 | 1200 | 1152 | |
| 3 | 196 | D | C | The area of strong westerly winds occurring between 40° S and 60° S latitude is called the ____________________. | polar easterlies | prevailing westerlies | roaring forties | jet streams | |
| 3 | 197 | D | A | Chart legends printed in capital letters show that the associated landmark is _____. | conspicuous | inconspicuous | a government facility or station | a radio transmitter | |
| 3 | 198 | D | C | You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133° T, and bears 343° T at 92 miles from you. What is the time to intercept if you make 9 knots? | 7h 44m | 7h 12m | 6h 40m | 6h 08m | |
| 3 | 199 | D | A | Civil twilight occurs at 0558 zone time on 30 December 1981. Your DR position at that time is LAT 15°02' N, LONG 46°02' W. Which statement concerning the planets available for morning sights is TRUE? | At 0558, Mars can be used for an ex-meridian observation. | Venus, Jupiter, and Mars sights will yield a good three line fix. | Saturn will be near the prime vertical. | Venus will be visible low in the western sky. | |
| 3 | 200 | D | A | When navigating using DGPS (Differential Global Positioning System) you may expect your position to be accurate to within a radius of _________. | 10 meters | 20 meters | 50 meters | 100 meters | |
| 3 | 201 | D | B | What is a lighted safe water mark fitted with to aid in its identification? | Red and white retroreflective material | A spherical topmark | A sequential number | A red and white octagon | |
| 3 | 202 | D | D | On charts of U.S. waters, a magenta marking is NOT used for marking a _____. | radiobeacon | lighted buoy | prohibited area | 5-fathom curve | |
| 3 | 204 | D | B | Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the limb from 0° to the 60° reading is ___________. | 20° | 30° | 40° | 60° | |
| 3 | 205 | D | A | The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the ______________. | equation of time | difference of longitude between the local and central meridian in time units | longitude in time units | zone description | |
| 3 | 206 | D | C | The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the __________. | doldrums | westerlies | trades | easterlies | |
| 3 | 207 | D | D | An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle? | 16 days | 18 days | 6 years | 19 years | |
| 3 | 208 | D | D | The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals? | 0.5 knot | 0.7 knot | 0.8 knot | 1.0 knot | |
| 3 | 209 | D | A | The West Wind Drift is located __________. | near 60° S | on each side of the Equatorial Current | in the North Atlantic between Greenland and Europe | in the South Pacific near 5° S | |
| 3 | 210 | D | B | The position labeled C is a(n) ________________. | fix | running fix | estimated position | dead reckoning position | See illustration number(s): DO51NG |
| 3 | 211 | D | D | The light rhythm of Morse (A) is shown on ___________. | preferred-channel buoys | starboard- or port-side buoys | special marks | safe water buoys | |
| 3 | 212 | D | D | Which aid is NOT marked on a chart with a magenta circle? | Radar station | Radar transponder beacon | Radiobeacon | Aero light | |
| 3 | 213 | D | C | When using GPS, how many position lines are required for a 2D (dimensional) fix? | 1 | 2 | 3 | 4 | |
| 3 | 214 | D | C | A sextant having an index error that is "on the arc" has a ________. | positive correction | dip error | negative correction | semidiameter error | |
| 3 | 215 | D | C | The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian? | 1148 | 1200 | 1212 | It cannot be determined from the information given. | |
| 3 | 216 | D | B | The prevailing winds in the band of latitude from approximately 5° N to 30° N are the ________. | prevailing westerlies | northeast trade winds | southeast trade winds | doldrums | |
| 3 | 217 | D | B | In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) ________. | apogean tide | double high water | perigean tide | bore | |
| 3 | 218 | D | D | Lines of position may be __________. | hyperboles | straight lines | arcs | All of the above | |
| 3 | 219 | D | D | The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current? | Mile 52 | New Castle | Marcus Hook | Billingsport | |
| 3 | 220 | D | D | At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE? | The current is westerly at 0.5 knot. | You must increase speed to compensate for the current. | The current cannot be determined. | The drift is 0.25 knot. | |
| 3 | 221 | D | B | In United States waters, a buoy having red and white vertical stripes has a light characteristic of ____________. | group occulting | Morse (A) | interrupted quick flashing | quick flashing | |
| 3 | 222 | D | D | Which statement concerning the illustration is correct? (Soundings and heights are in meters) | Maury Lightship swings about her anchor on a circle with a 21-meter diameter. | The position of the lightship is indicated by the center of the star on the symbol's mast. | There is a 12 meter deep hole inside the 5-meter curve just west of Beito Island. | The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. | See illustration number(s): D010NG |
| 3 | 224 | D | A | A sextant having an index error that is "off the arc" has a ________. | positive correction | dip error | negative correction | semidiameter error | |
| 3 | 225 | D | A | The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at _____________. | 11-51-20 ZT | 12-00-00 ZT | 12-04-20 ZT | 12-08-40 ZT | |
| 3 | 226 | D | D | What winds blow towards the equator from the area about 30° north? | Prevailing westerlies | Roaring thirties | Equatorial flow | Northeast trades | |
| 3 | 227 | D | D | The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is ______________. | interval | mixed | diurnal | semidiurnal | |
| 3 | 228 | D | D | The Illustration shows the symbols used on radiofacsimile weather charts. Which of these symbols indicates a convergence line? | L | F | M | Q | See illustration number(s): D042NG |
| 3 | 229 | D | A | The shoreline on charts generally represents the mean _____. | high water line | low water line | low water spring line | tide level | |
| 3 | 231 | D | B | You are outbound in a buoyed channel on course 015° T. You sight a white light showing a Morse (A) characteristic bearing 359° relative. For safety, you should _______. | change course to 359° T to pass near to the buoy | stay in the channel and leave the bouy to port | alter course to 000° T and leave the buoy well clear to starboard | check the chart to see where the marked danger lies in relation to the buoy | |
| 3 | 232 | D | D | Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) | Maury lightship is visible for 17 miles. | The bottom to the south-southeast of the lightship is soft coral. | There is a 12-meter deep west of Beito Island and inside the 5-meter line. | There is a dangerous eddy southeast of Beito Island. | See illustration number(s): D010NG |
| 3 | 234 | D | D | When the declination of the Moon is 0°12.5' S, you can expect some tidal currents in Gulf Coast ports to ________. | exceed the predicted velocities | become reversing currents | have either a double ebb or a double flood | become weak and variable | |
| 3 | 235 | D | C | When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine ______________. | zone time | sunrise | time of local apparent noon | local mean time | |
| 3 | 236 | D | C | The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the ___________. | doldrums | horse latitudes | trade winds | prevailing westerlies | |
| 3 | 237 | D | A | Neap tides occur when the _____________. | Moon is in its first quarter and third quarter phases | Sun and Moon are on opposite sides of the Earth | Moon's declination is maximum and opposite to that of the Sun | Sun and Moon are in conjunction | |
| 3 | 238 | D | B | The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1430 and turn for 11 knots, at what point will you lose the ebb current? | New Castle | Liston Pt. | Arnold Pt. | Ship John Shoal Lt. | |
| 3 | 239 | D | D | As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys _____________. | decrease and the buoys are black | increase and the buoys are green | decrease and the buoys are red | increase and the buoys are red | |
| 3 | 240 | D | C | In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is _________. | at high water | when there is a following current | at slack water | at flood | |
| 3 | 241 | D | B | A spherical buoy may be __________. | numbered | lettered | green | red | |
| 3 | 242 | D | A | The difference between the heights of low and high tide is the _____________. | range | period | depth | distance | |
| 3 | 244 | D | D | To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current? | One hour after the predicted time | At the predicted time | 30 minutes before flood, one hour after an ebb | 30 minutes before the predicted time | |
| 3 | 245 | D | D | Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error? | Gaining 2 seconds | Losing 2 seconds | Fast 2 seconds | Fast 1 second | |
| 3 | 246 | D | C | The consistent winds blowing from the horse latitudes to the doldrums are called the ______________. | prevailing westerlies | polar easterlies | trade winds | roaring forties | |
| 3 | 247 | D | C | Neap tides occur ____________. | at the start of spring, when the Sun is nearly over the equator | only when the Sun and Moon are on the same sides of the Earth and are nearly in line | when the Sun and Moon are at approximately 90° to each other, as seen from the Earth | when the Sun, Moon, and Earth are nearly in line, regardless of alignment order | |
| 3 | 248 | D | D | What is the index error of sextant A in illustration D050NG? | 0° 10" off the arc | 0° 10" on the arc | 3° 00" off the arc | 4° 20" off the arc | See illustration number(s): D050NG |
| 3 | 249 | D | D | When using GPS, how many position lines are required for a 3D (dimensional) fix that takes into account altitude? | 1 | 2 | 3 | 4 | |
| 3 | 250 | D | A | Weather systems in the middle latitudes generally travel from _______. | west to east | east to west | north to south | None of the above | |
| 3 | 251 | D | B | A mid-channel buoy, if lighted, will show a ___________. | fixed red light | Morse (A) white light | green light | flashing red light | |
| 3 | 252 | D | B | A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? | A | B | C | D | See illustration number(s): D015NG |
| 3 | 254 | D | A | The range of tide is the __________. | difference between the heights of high and low tide | distance the tide moves out from the shore | duration of time between high and low tide | maximum depth of the water at high tide | |
| 3 | 255 | D | C | On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time? | You are in -12 time zone. | It is 1700, March 18. | It is 0500, March 16. | It is 0500, March 18. | |
| 3 | 256 | D | A | The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the ______________. | subtropical high pressure belt | intertropical convergence zone | doldrum belt | polar frontal zone | |
| 3 | 257 | D | D | Spring tides occur ___________. | at the start of spring, when the Sun is nearly over the equator | only when the Sun and Moon are on the same side of the Earth and nearly in line | when the Sun and Moon are at approximately 90° to each other as seen from the Earth | when the Sun, Moon, and Earth are nearly in line, in any order | |
| 3 | 258 | D | D | You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter ______________. | cirrus clouds | long swells | smoother seas and warmer water | steeper waves, closer together | |
| 3 | 259 | D | C | The Illustration shows the symbols used on radiofacsimile weather charts. The symbol indicated at letter "Q" represents a _______________. | convergence zone | squall line | convergence line | weather boundary | See illustration number(s): D042NG |
| 3 | 260 | D | B | The National Ocean Service publishes the ___________. | Light Lists | Coast Pilots | pilot charts | Sailing Directions | |
| 3 | 261 | D | D | You are heading out to sea in a buoyed channel and see a quick-flashing green light on a buoy ahead of you. In U.S. waters, you should leave the buoy ______________. | well clear on either side | about 50 yards off on either side | to port | to starboard | |
| 3 | 262 | D | D | Which of the buoy symbols in illustration D032NG indicates a safe water mark? | A | B | C | D | See illustration number(s): D032NG |
| 3 | 264 | D | B | Which of the four adjustable errors in the sextant is the principle cause of index error? | Telescope not being parallel to the frame | Index mirror and horizon glass not being parallel | Index mirror not being perpendicular to the frame | Horizon glass not being perpendicular to the frame | |
| 3 | 265 | D | C | It is 1200 local time for an observer at 54° E longitude. Which statement is TRUE? | It is afternoon at Greenwich. | It is midnight at 126° E longitude. | The observer is in time zone -4. | All of the above are true. | |
| 3 | 266 | D | A | The horse latitudes are characterized by __________________. | weak pressure gradients and light, variable winds | the formation of typhoons or hurricanes in certain seasons | steady winds in one direction for six months followed by wind reversal for the next six months | steady winds generally from the southeast in the Southern Hemisphere | |
| 3 | 267 | D | B | You are inbound in a channel marked by a range. The range line is 309° T. You are steering 306° T and have the range in sight as shown. The range continues to open. What action should you take? | Alter course to the right to 309° T or more to bring the range in line. | Alter course to the left until the range closes, then steer to the left of 306° T. | Alter course to the left to close the range, then alter course to 309° T. | Maintain course as it is normal for the range to open as you get close. | |
| 3 | 268 | D | D | The illustration shows the symbols used on radiofacsimile weather charts. The symbol indicated at letter "L" represents a ______________________. | convergence line | maritime air mass | warm front | convergence zone | See illustration number(s): D042NG |
| 3 | 269 | D | D | The wind at Frying Pan shoals has been south-southwesterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 232° at 0.8 knot. What current should you expect? | 065° at 1.2 knots | 092° at 1.3 knots | 139° at 0.6 knot | 224° at 0.4 knot | |
| 3 | 270 | D | C | You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should ___________. | drop the anchor immediately as the range lights mark an area free of obstructions | drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor | ensure your ship will NOT block the channel or obstruct the range while at anchor | NOT drop the anchor until the lights are in line | See illustration number(s): D047NG |
| 3 | 271 | D | D | Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take? | Turn hard right to get back into the channel. | Pass the buoy close to, leaving it to your port. | Stop and fix your position. | Stand on, leaving the buoy to your starboard. | |
| 3 | 272 | D | B | What does the symbol shown indicate on a chart? | A sunken vessel marked by a buoy | A safe water beacon | A red and white can buoy | A can buoy with a rotating white light | See illustration number(s): D033NG |
| 3 | 274 | D | A | Which of the four adjustable errors in the sextant causes side error? | Horizon glass not being perpendicular to the frame | Index mirror not being perpendicular to the frame | Telescope not being parallel to the frame | Elliptical centering error | |
| 3 | 275 | D | A | Which statement concerning illustration D010NG is correct? (Soundings and heights are in meters) | The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. | There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. | The position of the lightship is indicated by the center of the star on the symbol's mast. | Maury Lightship swings about her anchor on a circle with a 21-meter diameter. | |
| 3 | 276 | D | B | The region of high pressure extending around the Earth at about 35° N latitude is called the ___________. | prevailing westerlies | horse latitudes | troposphere | doldrums | |
| 3 | 277 | D | B | Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________. | low water neap | low water spring | high water neap | high water spring | |
| 3 | 278 | D | D | You are underway on course 050° T and your maximum speed is 11 knots. The eye of a hurricane bears 070° T, 80 miles from your position. The hurricane is moving towards 270° T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be | 84 miles | 79 miles | 74 miles | 66 miles | |
| 3 | 279 | D | A | As a vessel changes course to starboard, the compass card in a magnetic compass _____________. | remains aligned with compass north | also turns to starboard | first turns to starboard then counterclockwise to port | turns counterclockwise to port | |
| 3 | 280 | D | B | Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks ___________________. | the port side of the channel | safe water | a hazard to navigation | the position of underwater cables | |
| 3 | 281 | D | B | A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________. | white light | red light | green light | light characteristic of Morse (A) | |
| 3 | 282 | D | D | The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light? | It is visible 10 miles. | Its distinguishing number is "19M". | It has a radar reflector. | None of the above | |
| 3 | 284 | D | B | The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is _________________. | index error | prismatic error | perpendicularity of the horizon glass | perpendicularity of the index mirror | |
| 3 | 285 | D | C | The apparent wind is zero when the true wind is __________. | zero | from ahead and equal to the ship's speed | from astern and equal to the ship's speed | from astern and is twice the ship's speed | |
| 3 | 286 | D | D | On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the _________. | prevailing westerlies | geostrophic winds | doldrums | horse latitudes | |
| 3 | 287 | D | D | The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is _____________. | between -.7 and +.5 feet | between 1.9 and 3.2 feet | 4.1 feet | 1.2 feet | |
| 3 | 288 | D | C | When using a radar in a unstabilized mode, fixes are determined most easily from __________. | center bearings | tangent bearings | ranges | objects that are close aboard | |
| 3 | 289 | D | A | A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) _________________. | running fix | dead-reckoning position | fix | estimated position | |
| 3 | 290 | D | D | The true wind is from 330‚ T, speed 6 knots. You want the apparent wind to be 30 knots from 10‚ on your port bow. To what course and speed must you change? | Cn 240‚, 28.0 knots | Cn 270‚, 28.0 knots | Cn 180‚, 30.0 knots | Cn 090‚, 32.5 knots | |
| 3 | 291 | D | A | A buoy marking a wreck will show a(n) _______. | white light FL (2) and a topmark of 2 black spheres | occulting green light and may be lettered | yellow light and will be numbered | continuous quick white light and may be numbered | |
| 3 | 292 | D | C | The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess? | It is visible two nautical miles. | Its distinguishing number is "19M". | It has a red light. | It flashes once every ten seconds. | |
| 3 | 294 | D | A | What is a nonadjustable error of the sextant? | Prismatic error | Index error | Side error | Error of collimation | |
| 3 | 295 | D | B | The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the _____________. | right ascension | meridian angle | SHA of the observer | zenith distance | |
| 3 | 296 | D | A | The wind flow from the horse latitudes to the doldrums is deflected due to __________________. | Coriolis force | the mid-latitude, semi-permanent high | differing atmospheric pressures | the prevailing westerlies | |
| 3 | 297 | D | C | The tides in Boston Harbor generally _____________. | are diurnal in nature | have their variations caused by the changing declination of the Moon | have a greater range than the tides in Gulf Coast ports | All of the above | |
| 3 | 298 | D | A | A great circle crosses the equator at 173° E. It will also cross the equator at what other longitude? | 7° W | 73° E | 73° W | 173° W | |
| 3 | 299 | D | B | Steady precipitation is typical of _______________________. | coming cold weather conditions | a warm front weather condition | high pressure conditions | scattered cumulus clouds | |
| 3 | 300 | D | C | Which of the symbols shown represents a warm front? | A | B | C | D | See illustration number(s): DO18NG |
| 3 | 301 | D | D | In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which characteristic? | Flashing | Occulting | Quick Flashing | All of the above | |
| 3 | 302 | D | A | Which symbol represents a 20-fathom curve? | -..-..-..-..- | - - - - - - - - | - - . - - . - - . - - . | - - - - - - - - | |
| 3 | 304 | D | B | In order to remove index error from a sextant, you should adjust the ___________________. | index mirror to make it parallel to the horizon glass with the index set at zero | horizon glass to make it parallel to the index mirror with the index set at zero | horizon glass to make it parallel to the sextant frame | telescope to make it perpendicular to the sextant frame | |
| 3 | 305 | D | A | IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a _____________. | red can buoy | black can buoy | red conical buoy | black conical buoy | |
| 3 | 306 | D | A | Weather conditions in the middle latitudes generally move _________. | eastward | westward | northward | southward | |
| 3 | 307 | D | C | The time meridian that is used when computing the currents for Pensacola Bay, Florida, is _____________. | 60° W | 75° W | 90° W | 105° W | |
| 3 | 308 | D | B | The wind at Frying Pan shoals has been west-northwesterly at an average velocity of 40 knots. The predicted set and drift of the rotary current are 323° at 0.6 knot. What current should you expect? | 001° at 0.7 knot | 018° at 0.4 knot | 052° at 0.6 knot | 089° at 0.9 knot | |
| 3 | 309 | D | C | You are underway on course 050‚ T and your maximum speed is 12 knots. The eye of a hurricane bears 120‚ T, 110 miles from your position. The hurricane is moving towards 285‚ T at 25 knots. What course should you steer at 12 knots to have the maximum CPA? | 332‚ | 339‚ | 346‚ | 357‚ | |
| 3 | 310 | D | B | Which sextant shown has an index error of 3'30" off the arc? | A | B | C | D | See illustration number(s): D050NG |
| 3 | 311 | D | B | You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on ______________. | the vessel's starboard side | the vessel's port side | either side close aboard | either side well clear | |
| 3 | 312 | D | B | The depth of water on a chart is indicated as 23 meters. This is equal to _________________. | 11.5 fathoms | 12.6 fathoms | 69.0 feet | 78.6 feet | |
| 3 | 314 | D | D | Which of these sextant errors is nonadjustable? | Prismatic error | Graduation error | Centering error | All of the above | |
| 3 | 315 | D | C | Which statement about the time diagram shown DO08NG is TRUE? | You are in west longitude. | Your date is ahead of Greenwich. | The meridian angle of the Sun is east. | The GHA of the Sun is less than 180‚. | |
| 3 | 316 | D | A | According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the ______________. | northeast | west-southwest | northwest | south-southeast | |
| 3 | 317 | D | C | The time meridian used for tide computations in New York Harbor is _____________. | 52°30' W | 60°00' W | 75°00' W | 82°30' W | |
| 3 | 318 | D | B | Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the _____________. | distance to the next port | speed of the vessel over the ground or through the water | time of the next navigational satellite pass | None of the above | |
| 3 | 319 | D | B | The Illustration shows the symbols used by radiofacsimile weather charts. The symbol indicated at letter "F" represents a _______________. | maritime air mass | weather boundary | convergence zone | squall line | See illustration number(s): D042NG |
| 3 | 320 | D | C | Sometimes foreign charts are reproduced by DMA. On such a chart, a wire-dragged, swept area may be shown in green or ____________. | red | black | purple | yellow | |
| 3 | 321 | D | B | Which buoy may be even numbered? | Mid-channel buoy | Unlighted nun buoy | Lighted green buoy | All of the above | |
| 3 | 322 | D | C | The chart symbol indicating that the bottom is coral is _____________. | C | Cl | Co | c | |
| 3 | 324 | D | C | Index error of a sextant is primarily caused by __________. | improperly correcting the other errors in a sextant | the horizon glass not being parallel to the horizon mirror | the horizon glass not being parallel to the index mirror | human error in taking a celestial observation | |
| 3 | 325 | D | D | What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'? | 30°30' E | 59°30' W | 120°30' W | 149°30' E | |
| 3 | 326 | D | A | You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the ________. | north | south | east | west | |
| 3 | 327 | D | B | When daylight savings time is kept the times of tide and current calculations must be adjusted. One way of doing this is to __________. | subtract one hour from the times listed under the reference stations | add one hour to the times listed under the reference stations | apply no correction, as the times in the reference stations are adjusted for daylight savings time | add 15‚ to the standard meridian when calculating the time difference | |
| 3 | 328 | D | C | The direction of prevailing winds in the Northern hemisphere is caused by the ______________________________. | magnetic field at the North Pole | Gulf Stream | Earth's rotation | Arctic cold fronts | |
| 3 | 329 | D | D | The symbols shown are used on radiofacsimile weather charts. Which symbol indicates a weather boundary? | I | H | G | F | See illustration number(s): D042NG |
| 3 | 330 | D | A | You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is ___________. | 90° | 30° | 45° | 60° | |
| 3 | 331 | D | D | What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System) | White light | Group flashing characteristic | Nun shape | Odd number | |
| 3 | 332 | D | C | Which chart symbol indicates the bottom is clay? | Cly | Cla | Cl | C | |
| 3 | 334 | D | D | The index error is determined by adjusting the ____________. | sextant frame | horizon glass | index mirror | micrometer drum | |
| 3 | 335 | D | A | What is the geographic longitude of a body whose GHA is 232°27'? | 127°33' E | 52°27' E | 61°52' W | 61°52' E | |
| 3 | 336 | D | D | You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies ______________. | ahead of you | astern of you | to the north | to the south | |
| 3 | 337 | D | B | To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________. | the actual depth | added to or subtracted from the charted depth | multiplied by the charted depth | divided by the charted depth | |
| 3 | 338 | D | C | The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents ____________________. | hail | freezing rain | rain | snow | See illustration number(s): D042NG |
| 3 | 339 | D | C | The wind at Frying Pan shoals has been north-northeasterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 355° at 0.8 knot. What current should you expect? | 010° at 1.1 knots | 047° at 0.3 knot | 325° at 0.7 knot | 279° at 1.0 knot | |
| 3 | 340 | D | D | Information about the direction and velocity of rotary tidal currents is found in the ___________. | Mariner's Guide | Nautical Almanac | Tide Tables | Tidal Current Tables | |
| 3 | 341 | D | C | Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? | Flashing | Quick flashing | Composite group flashing | Equal interval (isophase) | |
| 3 | 342 | D | D | A polyconic projection is based on a __________________. | plane tangent at one point | cylinder tangent at one parallel | cone tangent at one parallel | series of cones tangent at selected parallels | |
| 3 | 344 | D | B | A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has ___________________. | error of perpendicularity | side error | prismatic error | centering error | |
| 3 | 345 | D | C | A navigator fixing a vessel's position by radar ________. | should never use radar bearings | should only use radar bearings when the range exceeds the distance to the horizon | can use radar information from one object to fix the position | must use information from targets forward of the beam | |
| 3 | 346 | D | C | If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere? | East to northeast | East to southeast | North to northwest | South to southeast | |
| 3 | 347 | D | A | The illustration shows the symbols used on radiofacsimile weather charts. Which of these symbols indicates rain? | N | M | I | G | See illustration number(s): D042NG |
| 3 | 348 | D | D | When using a radar in an unstabilized mode, fixes are determined most easily from _____________________. | center bearings | tangent bearings | objects that are close aboard | ranges | |
| 3 | 349 | D | C | The direction of the southeast trade winds is a result of the __________. | equatorial current | humidity | rotation of the earth | change of seasons | |
| 3 | 350 | D | C | When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. This light is called the ___________. | diffusion | backscatter | loom | elevation | |
| 3 | 351 | D | B | Which buoy may be odd numbered? | A spherical buoy | An unlighted can buoy | A red buoy | A yellow buoy | |
| 3 | 352 | D | D | Which chart projection would be most suitable for marine surveying? | Gnomonic | Lambert conformal | Mercator | Polyconic | |
| 3 | 354 | D | C | In order to remove side error from a sextant, you should adjust the _________________. | horizon glass to make it parallel to the horizon mirror with the index set at zero | horizon glass to make it perpendicular to the index mirror with the index set at zero | horizon glass to make it perpendicular to the sextant frame | telescope to make it parallel to the sextant frame | |
| 3 | 355 | D | C | During the month of October the Sun's declination is ______. | north and increasing | north and decreasing | south and increasing | south and decreasing | |
| 3 | 356 | D | D | When facing into the wind in the Northern Hemisphere the center of low pressure lies _________________. | directly in front of you | directly behind you | to your left and behind you | to your right and behind you | |
| 3 | 357 | D | B | On 10 August 1983 you will dock near Days Point, Weehawken, on the Hudson River, at 1800 DST (ZD +4). The charted depth alongside the pier is 24 feet (7.3 meters). What will be the depth of water when you dock? | 23.5 feet (7.1 m) | 23.9 feet (7.2 m) | 24.9 feet (7.5 m) | 26.3 feet (8.0 m) | |
| 3 | 358 | D | B | What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983? | 015° | 125° | 162° | 225° | |
| 3 | 359 | D | D | You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233° T, and bears 264° T, 68 miles from you. What is the time to intercept if you make 13 Knots? | 6h 31m | 6h 47m | 7h 03m | 7h 34m | |
| 3 | 360 | D | B | The Illustration shows the symbols used on radiofacsimile weather charts. The symbol indicated at letter "M" represents _______. | rain | snow | hail | ice | See illustration number(s): D042NG |
| 3 | 361 | D | B | As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashing light. How should you pass this buoy? | Pass it about 50 yards off on either side. | Leave it to your starboard. | Leave it to your port. | Pass it well clear on either side. | |
| 3 | 362 | D | D | Which statement about a simple conic chart projection is TRUE? | It is an equal-area projection. | It is a conformal projection. | Meridians appear as curved lines. | The scale is correct along any meridian. | |
| 3 | 363 | D | D | Your dead reckoning position should be plotted _______________. | whenever an estimated position is plotted | when it agrees with your loran position | when coming on or going off soundings | at least every hour on the hour in the open waters of the sea | |
| 3 | 364 | D | A | What causes the error of collimation with regards to the four adjustments to a sextant? | Telescope not parallel to the frame | Personal error | The frame and index mirror not perpendicular | The frame and horizon glass not perpendicular | |
| 3 | 365 | D | A | The Sun at a maximum declination north would be approximately at ______________. | aphelion | perihelion | autumnal equinox | first point of Aries | |
| 3 | 366 | D | B | If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________. | left, slightly behind him | right, slightly behind him | left, slightly in front of him | right, slightly in front of him | |
| 3 | 367 | D | C | What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983? | 936 | 942 | 951 | 1001 | |
| 3 | 368 | D | A | A great circle crosses the equator at 134° E. It will also cross the equator at what other longitude? | 46° W | 124° W | 134° W | 34° E | |
| 3 | 369 | D | D | You are underway on course 050‚ T and your maximum speed is 11 knots. The eye of a hurricane bears 070‚ T, 80 miles from your position. The hurricane is moving towards 270‚ T at 19 knots. What course should you steer at 11 knots to have the maximum CPA? | 250‚ | 234‚ | 227‚ | 2152 | |
| 3 | 370 | D | D | Prevailing winds between 30° N and 60° N latitude are from the __________________. | north | south | east | west | |
| 3 | 371 | D | C | Which buoy may be odd numbered? | Mid-channel buoy | Unlighted nun buoy | Lighted green buoy | All of the above | |
| 3 | 372 | D | A | You would find the variation on a polyconic projection chart __________. | on the compass rose | on the mileage scale | written on the chart title | at each line of longitude | |
| 3 | 374 | D | A | There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable? | Error of collimation | Prismatic error | Graduation error | Centering error | |
| 3 | 375 | D | A | If the Sun's observed altitude is 47°50', the zenith distance is _____. | 42°10' | 42°50' | 47°50' | 132°10' | |
| 3 | 376 | D | D | According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the ______________. | northeast | west-southwest | northwest | south-southeast | |
| 3 | 377 | D | B | Determine the height of the tide at 2045 EST (ZD +5) at Augusta, ME, on 8 March 1983. | 1.4 feet (0.5 meter) | 1.9 feet (0.6 meter) | 2.3 feet (0.7 meter) | 2.6 feet (0.8 meter) | |
| 3 | 378 | D | B | A navigator fixing a vessel's position by radar _________. | should never use radar bearings | can use radar information from one object to fix the position | should only use radar bearings when the range exceeds the distance to the horizon | must use information from targets forward of the beam | |
| 3 | 379 | D | C | The steady current circling the globe at about 60° S is the __________. | Prevailing Westerly | Sub-Polar Flow | West Wind Drift | Humboldt Current | |
| 3 | 380 | D | B | Prevailing winds between 30° N and 60° N latitude are from the _______________. | east | west | north | south | |
| 3 | 381 | D | B | A nun buoy will _______________. | be green in color | have an even number | be left to port when entering from seaward | be cylindrical in shape | |
| 3 | 382 | D | A | Which would you consult for information about the general current circulation in the North Atlantic Ocean? | Pilot chart | Coast Pilot | Current Table | Climatological Atlas | |
| 3 | 384 | D | D | Which is a nonadjustable error of the sextant? | Error of perpendicularity | Side error | Error of collimation | Centering error | |
| 3 | 385 | D | C | The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by _____. | colatitude | codistance | zenith distance | altitude | |
| 3 | 388 | D | D | You are underway on course 120‚ T and your maximum speed is 12 knots. The eye of a hurricane bears 150‚ T, 120 miles from your position. The hurricane is moving towards 295‚ T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be | 89 miles | 96 miles | 105 miles | 117 miles | |
| 3 | 389 | D | A | The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________. | navigable semicircle | dangerous semicircle | low pressure area | eye of the storm | |
| 3 | 390 | D | A | During the winter months, the southeast trade winds are ________. | stronger than during the summer months | weaker than during the summer months | drier than during the summer months | wetter than during the summer months | |
| 3 | 391 | D | C | When outbound from a U.S. port, a buoy displaying a flashing red light indicates ____________. | a junction with the preferred channel to the left | a sharp turn in the channel to the right | the port side of the channel | a wreck to be left on the vessel's starboard side | |
| 3 | 392 | D | B | A pilot chart does NOT contain information about ________. | average wind conditions | tidal currents | magnetic variation | average limits of field ice | |
| 3 | 393 | D | A | If your position is LAT 25° N, LONG 35° W, what is the correction you would apply to an RDF bearing received from a transmitting station in LAT 30° N, LONG 40° W? | -1.3° | +1.3° | -2.1° | +2.1° | |
| 3 | 394 | D | C | An instrument designed to maintain a continuous record of atmospheric pressure is a(n) _________________. | mercurial barometer | aneroid barometer | barograph | thermograph | |
| 3 | 395 | D | A | If the Sun's observed altitude is 27°12', the zenith distance is _____. | 62°48' | 27°12' | 152°48' | 43°12' | |
| 3 | 396 | D | C | Your vessel is on course 150° T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind? | 9.0 knots | 10.2 knots | 11.0 knots | 12.0 knots | |
| 3 | 397 | D | D | The mean tide level at Peaks Island, ME, is _____. | 1.8 feet (0.5 meters) | 2.5 feet (0.8 meters) | 3.2 feet (1.0 meters) | 4.5 feet (1.4 meters) | |
| 3 | 398 | D | B | The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the ___________. | ship's speed is more than the true wind velocity | true wind is from dead astern | true wind is on the beam | true wind is from dead ahead | |
| 3 | 399 | D | D | Where will you find information about the duration of slack water? | American Practical Navigator | Sailing Directions | Tide Tables | Tidal Current Tables | |
| 3 | 400 | D | D | Information about the currents for the Pacific Coast of the U. S. are found in the _____. | Ocean Current Tables | Nautical Almanac | Tide Tables | Tidal Current Tables | |
| 3 | 401 | D | A | You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take? | Alter course to port and leave the buoy to starboard. | Alter course to starboard and leave the buoy to port. | Alter course and leave the buoy near by on either side. | Alter course and pass the buoy well-off on either side. | |
| 3 | 402 | D | D | All of the following can be found on a Pilot Chart EXCEPT information concerning the ______________. | percentage of frequency of wave heights | percentage of poor visibility conditions | sea surface temperatures | amounts of precipitation | |
| 3 | 403 | D | C | Your position is LAT 20°00' N, LONG 45°00' W when you takea radio bearing on a ship in distress in LAT 15°00' N, LONG40°00' W. Your RDF bearing corrected for calibration erroris 135.6° T. What is the rhumb line course to rendezvouswith the vessel in distr | 134.9° T | 135.6° T | 136.2° T | 136.9° T | |
| 3 | 404 | D | B | An aneroid barometer is an instrument _____________________. | used to measure the speed of wind | in which the pressure of the air is measured | that tells which direction a storm is coming from | used to measure the height of waves | |
| 3 | 405 | D | C | At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is _____. | 510 miles | 1220 miles | 2040 miles | 2260 miles | |
| 3 | 406 | D | D | Your vessel is on course 135° T, speed 18 knots. From the appearance of the sea you estimate the speed of the true wind as 24.5 knots. The apparent wind is 40° on the starboard bow. Determine the speed of the apparent wind. | 24.2 knots | 28.4 knots | 32.2 knots | 36.0 knots | |
| 3 | 407 | D | B | What would be the height of the tide at Crisfield, MD, at 0310 DST (ZD +4) on 6 May 1983? | 0.1 foot | 0.5 foot | 1.1 feet | 1.6 feet | |
| 3 | 408 | D | C | A buoy bears 176° T at 3000 yards. What is the course to make good to leave the buoy 100 yards to port? | 174° T | 176° T | 178° T | 180° T | |
| 3 | 409 | D | A | On November 1st the zone time is 1700 EST (ZD +5) in LONG 75° W. What is the corresponding zone time and date inLONG 135° E? | 0700, November 2nd | 0700, November 1st | 2200, November 1st | 2200, October 31st | |
| 3 | 410 | D | B | The height of the tide at low water is 0.0 feet. The range is 9.0 feet. The duration is 06h 00m. The height of the tide 02h 12m before high water will be _________________. | 8.3 feet | 6.3 feet | 4.7 feet | 2.7 feet | |
| 3 | 411 | D | C | When entering from seaward, a buoy displaying a single-flashing red light would indicate ____________. | a junction with the preferred channel to the left | a sharp turn in the channel to the right | the starboard side of the channel | a wreck to be left on the vessel's port side | |
| 3 | 412 | D | A | If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________. | Pilot Chart | Coast Pilot | Notice to Mariners | None of the above | |
| 3 | 413 | D | A | You would need to apply the conversion angle to an RDF bearing, prior to plotting the bearing on a chart, when the ship and the station are both on ______________. | latitude 50° S, 200 miles apart | longitude 50° W, 150 miles apart | the equator, 175 miles apart | latitude 30° N, 50 miles apart | |
| 3 | 414 | D | D | The barometer is an instrument for measuring the __________. | temperature | relative humidity | dew point | atmospheric pressure | |
| 3 | 415 | D | A | If the Sun's observed altitude is 54°30', what is the zenith distance? | 35°30' | 45°30' | 12¹30' | 14°30' | |
| 3 | 416 | D | B | A ship is on course 195° at a speed of 15 knots. The apparent wind is from 40° on the port bow, speed 30 knots. The direction and speed of the true wind are _____________. | 068° T, 30 knots | 127° T, 21 knots | 263° T, 42 knots | 292° T, 42 knots | |
| 3 | 417 | D | D | On 6 July 1983, at 1830 DST (ZD +4), what will be the predicted height of tide at Newburgh, NY? | 3.3 feet | 2.6 feet | 2.4 feet | 2.0 feet | |
| 3 | 418 | D | A | In most cases, the direction of the apparent wind lies between the bow and ____________. | the direction of the true wind | true north | the beam on the windward side | the beam on the lee side | |
| 3 | 419 | D | B | The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the ________. | abyssal plain | continental shelf | borderland | offshore terrace | |
| 3 | 420 | D | A | You are inbound in a channel marked by a range. The range line is 309° T. You are steering 306° T and have the range in sight as shown. The range continues to open. What action should you take? | Alter course to the left until the range closes then steer to the left of 306° T. | Maintain course as it is normal for the range to open as you get close. | Alter course to the left to close the range, then alter course to 309° T. | Alter course to the right to 309° T or more to bring the range in line. | See illustration number(s): D047NG |
| 3 | 421 | D | B | Daylight savings time is a form of zone time that adopts the time _____________. | one zone to the west | one zone to the east | two zones to the west | two zones to the east | |
| 3 | 422 | D | B | If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms? | Sailing Charts of the Caribbean Sea | Pilot Charts of the North Atlantic | Light Lists, Atlantic and Gulf Coast | Tidal Current Tables | |
| 3 | 423 | D | B | You have calibrated your RDF. When compiling the calibration table, the correction to be applied to any future RDF bearings is listed against the ______________. | true bearing of the transmitter | relative bearing of the transmitter | heading of the vessel | time of reception | |
| 3 | 424 | D | D | For an accurate barometer check, you would ________________. | check it with a barometer on another vessel | take readings from several barometers and average them | check it with the barometer at the ship chandlery | check it against radio or National Weather Service reports of the immediate vicinity | |
| 3 | 425 | D | D | 90° - Ho = _____. | sextant altitude | co-latitude | LHA | zenith distance | |
| 3 | 426 | D | C | The wind speed and direction observed from a moving vessel is known as _________________. | coordinate wind | true wind | apparent wind | anemometer wind | |
| 3 | 427 | D | C | On 23 March 1983, at Kingston Point, NY, what is the earliest time after 1700 EST (ZD +5) that the predicted tide will be +2.0 feet? | 1730 | 1800 | 1854 | 2030 | |
| 3 | 428 | D | B | A buoy bears 178° T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to starboard? | 174° T | 176° T | 178° T | 180° T | |
| 3 | 429 | D | B | A great circle crosses the equator at 127° W. It will also cross the equator at what other longitude? | 127° E | 53° E | 27° E | 27° W | |
| 3 | 430 | D | D | The southeast trade winds actually blow toward the ________. | southeast | south | east | northwest | |
| 3 | 431 | D | D | When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by ______________. | the shape of an unlighted buoy | the light color of a lighted buoy | the color of the topmost band | whether the number is odd or even | |
| 3 | 432 | D | B | When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to ______________. | the meridian through the object of the bearing | the meridian through the ship's position | the meridian midway between the ship and the object | any meridian | |
| 3 | 433 | D | A | You are swinging ship to calibrate the RDF. The gyro error is 2° W. The RDF gyro bearing of a station is 308° at the same time the visual bearing is 307°. At the time of the bearing, you are heading 270° T. When you prepare the calibration chart, you wou | correction is -1° when the relative bearing is 035° | error is -1° when the heading is 270° | correction is +1° when the relative bearing is 325° | error is -1° on all headings | |
| 3 | 434 | D | B | The purpose of the "set" hand on an aneroid barometer is to _______. | adjust the barometer | indicate any change in the reading of the barometer | provide a correction for height above sea level | provide a correction for temperature changes | |
| 3 | 435 | D | C | If an observer is at 35° N latitude, his zenith is _____. | 55° S of the celestial equator | at the north celestial pole | 35° N of the celestial equator | 55° N of the celestial equator | |
| 3 | 436 | D | C | A wind vane on a moving vessel shows _________________. | dead reckoning wind direction | true wind direction | apparent wind direction | estimated wind direction | |
| 3 | 437 | D | B | Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)? | 22.4 feet (6.8 meters) | 23.4 feet (7.2 meters) | 24.9 feet (7.6 meters) | 25.7 feet (7.8 meters) | |
| 3 | 438 | D | C | Your longitude is 124° E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is _________. | 1336 on the 4th | 1336 on the 5th | 2104 on the 4th | 2104 on the 5th | |
| 3 | 439 | D | A | If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere? | South-southwesterly | North-northwesterly | South-southeasterly | North-northeasterly | |
| 3 | 440 | D | D | You are inbound in a channel marked by a range. The range line is 309° T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? | Continue on the present heading until the range is in line, then alter course to the left. | Immediately alter course to the right to bring the range in line. | Immediately alter course to 309° T. | Continue on course until the range is closed, then alter course to the right. | See illustration number(s): D047NG |
| 3 | 441 | D | B | A yellow buoy may exhibit a(n) _____________. | fixed red light | flashing light | white light | occulting light | |
| 3 | 442 | D | D | In very high latitudes, the most practical chart projection is the _____________. | Mercator | gnomonic | azimuthal | Lambert conformal | |
| 3 | 443 | D | D | You are swinging ship to calibrate the RDF. The RDF gyro bearing is 054° at the same time the visual bearing is 053° pgc. Gyro error is 1° W. At the time of the bearings the heading was 339° pgc. Which statement about the calibrations are TRUE? | 1° must be subtracted from all RDF bearings. | 1° must be subtracted from all bearings when the ship is headed 339° T. | 1° must be subtracted from all RDF bearings of 053° T. | 1° must be subtracted from all RDF bearings of 075° relative. | |
| 3 | 444 | D | B | A sylphon cell is a part of a ________________. | maximum thermometer | barograph | thermograph | hygrometer | |
| 3 | 445 | D | C | The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the _________________. | upper limb of a celestial body | lower limb of a celestial body | centers of the various celestial bodies | lower limb of the Sun and Moon; center of the stars and planets | |
| 3 | 446 | D | B | The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is ______________. | northwest, west, and south | southwest, south, and southeast | north, northwest, and east | west, northwest, and north | |
| 3 | 447 | D | A | On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT? | 5.3 feet (1.6 m) | 5.6 feet (1.7 m) | 6.2 feet (1.9 m) | 6.8 feet (2.7 m) | |
| 3 | 448 | D | C | Mean high water is the reference datum used to measure ____. | soundings on the east coast of the United States | soundings in European waters | heights of topographical features in the United States | both heights and soundings worldwide | |
| 3 | 449 | D | D | You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063° T, and bears 136° T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A? | 340° | 295° | 158° | 114° | |
| 3 | 450 | D | C | You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter ________. | cirrus clouds | smoother seas and warmer water | steeper waves, closer together | long swells | |
| 3 | 451 | D | A | Which light characteristic can be used on a special purpose mark? | Fixed | Occulting | Equal interval | Quick flashing | |
| 3 | 452 | D | A | When navigating in high latitudes and using a chart based on a Lambert conformal projection, ______________. | a straight line drawn on the chart approximates a great circle | the chart should not be used outside of the standard parallels | the course angle is measured at the mid-longitude of the track line | distance cannot be measured directly from the chart | |
| 3 | 453 | D | B | The quadrantal correction to be applied to an RDF bearing is determined ______________. | from Bowditch Vol. II | from a table on board your ship | by requesting the calibration station to provide the information after the RDF is calibrated | by comparing the true and relative bearings of the transmitter | |
| 3 | 454 | D | A | On what does the operation of an aneroid barometer depend? | Thin, metal, air tight cell | Curved tube containing alcohol | Column of mercury supported by atmospheric pressure | Expansion of mercury in a closed tube | |
| 3 | 455 | D | D | The height of eye correction is smaller than geometrical dip because of ____________. | the angle between the horizontal and the line of sight to the visible horizon | index error | parallax | terrestrial refraction | |
| 3 | 456 | D | D | Which condition exists in the eye of a hurricane? | Wind rapidly changing direction | A temperature much lower than that outside the eye | Towering cumulonimbus clouds | An extremely low barometric pressure | |
| 3 | 457 | D | D | Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4). | 3.0 feet | 3.5 feet | 4.0 feet | 4.4 feet | |
| 3 | 458 | D | A | The prevailing westerlies of the Southern Hemisphere blow 18-30 knots _______________________. | all year long | during the summer months only | during the winter only | during spring only | |
| 3 | 459 | D | D | A buoy bears 178° T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to port? | 174° T | 176° T | 178° T | 180° T | |
| 3 | 460 | D | D | When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation? | The objects lie in a straight line. | The vessel is inside of a triangle formed by the objects. | The vessel is outside of a triangle formed by the objects. | A circle will pass through your position and the three objects. | |
| 3 | 461 | D | A | Under the U.S. Aids to Navigation System, a yellow buoy may _______. | mark a fish net area | be lighted with a white light | show a fixed red light | All of the above | |
| 3 | 462 | D | A | For what purpose would using a Lambert conformal chart be more convenient than using a Mercator? | Plotting radio bearings over a long distance | Determining latitude and longitude of a fix | Measuring rhumb line distances | Measuring rhumb line directions | |
| 3 | 463 | D | D | The signal transmitted by a radiobeacon station is called its ____________________. | group sequence | frequency | directional signal | characteristic signal | |
| 3 | 464 | D | C | Prior to reading an aneroid barometer, you should tap the face lightly with your finger to _________________. | expose any loose connections | demagnetize the metal elements | bring the pointer to its true position | contract and expand the glass face | |
| 3 | 465 | D | B | When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting _____________. | hs to the visible horizon | hs to the sensible horizon | hs to the celestial horizon | Ho to the celestial horizon | |
| 3 | 466 | D | C | In the relatively calm area near the hurricane center, the seas are ______________. | moderate but easily navigated | calm | mountainous and confused | mountainous but fairly regular as far as direction is concerned | |
| 3 | 467 | D | C | At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet? | 1612 | 1630 | 1653 | 1718 | |
| 3 | 468 | D | B | Which of the symbols in illustration D018NG represents a cold front? | A | B | C | D | See illustration number(s): DO18NG |
| 3 | 469 | D | C | Where are the prevailing westerlies of the Southern Hemisphere located? | Between the Equator and 10° latitude | Between 10° and 20° latitude | Between 30° and 60° latitude | Between 60° and 90° latitude | |
| 3 | 470 | D | C | You are underway on course 120° T and can make 12 knots. The eye of a hurricane bears 150° T at 120 miles. The hurricane is on course 295° at 20 knots. What course should you steer at 12 knots to have the maximum CPA? | 312° | 330° | 348° | 001° | |
| 3 | 471 | D | A | Yellow lights may appear on ______________. | special purpose buoys | vertically-striped buoys | horizontally-banded buoys | spherical buoys | |
| 3 | 472 | D | B | Which conic projection chart features straight lines which closely approximate a great circle? | Polyconic | Lambert conformal | Orthographic | Stereographic | |
| 3 | 473 | D | D | The quadrantal error of a radio bearing is caused by __________. | polarization at sunrise and sunset | not taking the bearing from the transmitting antenna | the signal passing over land before it reaches sea | the metal in a ship's structure | |
| 3 | 474 | D | B | Which indication on the barometer is most meaningful in forecasting weather? | The words "Fair -- Change -- Rain" | The direction and rate of change of barometric pressure | The actual barometric pressure | The relative humidity | |
| 3 | 475 | D | B | A correction for augmentation is included in the Nautical Almanac corrections for _________________. | the Sun | the Moon | Venus | None of the above | |
| 3 | 476 | D | A | Tropical cyclones normally form within which of the following belts of latitude? | 5° to 15° | 15° to 30° | 30° to 45° | 45° to 60° | |
| 3 | 477 | D | C | Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983. | 1.1 feet | 1.2 feet | 1.4 feet | 1.7 feet | |
| 3 | 478 | D | D | The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________. | ship's speed must be less than the true wind velocity | true wind must be from dead astern | true wind velocity must be faster than the ship's speed | true wind must be from dead ahead | |
| 3 | 479 | D | A | You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063° T, and bears 136° T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A? | 114° | 158° | 295° | 340° | |
| 3 | 480 | D | B | What kind of pressure systems travel in easterly waves? | High pressure | Low pressure | Subsurface pressure | Terrastatic pressure | |
| 3 | 481 | D | A | A special mark (yellow buoy), if lighted, may exhibit which light rhythm? | Flashing | Morse "A" | Equal interval | Occulting | |
| 3 | 482 | D | D | Which statement about a gnomonic chart is correct? | A rhumb line appears as a straight line. | Distance is measured at the midlatitude of the track line. | Meridians appear as curved lines converging toward the nearer pole. | Parallels, except the equator, appear as curved lines. | |
| 3 | 483 | D | A | Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets due to ______. | the effects of beam width | limitations on range resolution | the pulse length of the radar | the multiple-target resolution factor | |
| 3 | 484 | D | A | The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is _________________________. | 30.05 inches of mercury | 30.05 millimeters of mercury | 30.05 millibars | falling | |
| 3 | 485 | D | C | A phase correction is applied to observations of ________________. | the Sun | stars | planets | All of the above | |
| 3 | 486 | D | D | Tropical cyclones do not form within 5° of the Equator because ______________. | there are no fronts in that area | it is too hot | it is too humid | of negligible Coriolis force | |
| 3 | 487 | D | D | What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)? | 740 | 754 | 840 | 922 | |
| 3 | 488 | D | B | A great circle crosses the equator at 93° W. It will also cross the equator at what other longitude? | 13° E | 87° E | 177° E | 177° W | |
| 3 | 489 | D | A | You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action? | Get underway and be in deep, open-ocean water when the tsunami arrives. | Increase the scope of the anchor cable and drop the second anchor underfoot at short stay. | Get underway and be close inshore on the side of the island away from the tsunami. | Plant both anchors with about a 60° angle between them, and let out a long scope to each anchor. | |
| 3 | 490 | D | B | You are underway on course 050‚ T and your maximum speed is 10 knots. The eye of a hurricane bears 100‚ T, 90 miles from your position. The hurricane is moving towards 285‚ T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA? | 221‚ | 226‚ | 233‚ | 238‚ | |
| 3 | 491 | D | D | A special purpose buoy shall be ______________. | lighted with a white light | striped black and red | lighted with a red light | yellow | |
| 3 | 492 | D | B | Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth? | Lambert conformal | Oblique gnomonic | Mercator | Transverse conic | |
| 3 | 493 | D | C | The picture shown represents the geographic location ofa vessel and the radar presentation at the same time. Whichstatement is TRUE? | Ship No. 1 is not detected due to the shadow effect of the headland. | The small island is not detected due to the effect of beam width. | A tangent bearing of the headland to the south-southeast should be corrected by adding one-half of the beam width. | Ship No. 2 is not detected due to the reflective mass of the background mountain overpowering the ship's reflective signals. | See illustration number(s): D011NG |
| 3 | 494 | D | D | Barometers are usually calibrated to indicate atmospheric pressure in ___________________. | inches of mercury and centimeters | feet of mercury and millibars | inches of mercury and millimeters | inches of mercury and millibars | |
| 3 | 495 | D | B | A semidiameter correction is applied to observations of _________. | Mars | the Moon | Jupiter | All of the above | |
| 3 | 496 | D | D | Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the ________________. | Indian Ocean | North Pacific Ocean | South Pacific Ocean | South Atlantic Ocean | |
| 3 | 497 | D | B | What will be the time after 0300 (ZD +4), on 5 March 1983, when the height of the tide at Port of Spain, Trinidad, will be 2.5 feet (.76 meters) ? | 548 | 602 | 618 | 634 | |
| 3 | 498 | D | C | What is an advantage of the magnetic compass aboard vessels? | Compass error is negligible at or near the earth's magnetic poles. | It does not have to be checked as often. | It is reliable due to it's essential simplicity. | All points on the compass rose are readily visible. | |
| 3 | 499 | D | D | Which of the symbols shown represents an occluded front? | A | B | C | D | See illustration number(s): D018NG |
| 3 | 500 | D | B | The National Imagery and Mapping Agency would produce a chart of the coast of ________. | Alaska | Canada | Puerto Rico | Hawaii |