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 ________________.