DCYC
International Marine Signal Code Flags

Alpha
Bravo
Charlie
Delta
Echo
Foxtrot

Diver down Dangerous cargo Affirmative, yes Keep clear Altering course to starboard Disabled

...

Golf
Hotel
India
Juliet
Kilo
Lima

Want a pilot
Pilot on board
Altering course to port
On fire, keep clear
Desire to communicate
Stop instantly

...

Mike
November
Oscar
Papa
Quebec
Romeo

I am stopped
Negative, no
Man overboard
About to sail
Request pratique
not assigned

...

Sierra
Tango
Uniform
Victor
Whiskey
X-ray

Engines going astern
Keep clear of me
Standing into danger
I require assistance
I require medical assistance
Stop your Intention

...

Yankee
Zulu
1 - One
2 - Two
3 - Three
4 - Four

I am dragging anchor
Require a tug
Numeral 1
Numeral 2
Numeral 3
Numeral 4

...

5 - Five
6 - Six
7 - Seven
8 - Eight
9 - Nine
0 - Zero

Numeral 5
Numeral 6
Numeral 7
Numeral 8
Numeral 9
Numeral 0

...

Answering Pennant
1st Sub
2nd Sub
3rd Sub

Acknowledgement of signals
1st substitute
2nd substitute
3rd substitute

International distress signal

AC - I am abandoning my vessel.	LO - I am not in my correct position: used by a light vessel.	RU - Keep clear of me; I am maneuvering with difficulty.
AN - I need a doctor.	NC - I am in distress and require immediate assistance.	SO - You should stop your vessel instantly.
BR - I require a helicopter.	PD - Your navigation lights are not visible.	UM - the Harbour is closed to traffic.
CD - I require immediate assistance.	PP - Keep well clear of me.	UP - Permission to enter Harbour is urgently requested. I have an emergency.
DV - I am drifting.	QD - I am going ahead.	YU - I am going to communicate with your station by means of the International code of signals.
EF - SOS/MAYDAY has been canceled.	QT - I am going astern.	ZD1 - Please report me to the Coast Guard, New York
FA - Will you give me my position?	QQ - I require health clearance.	ZD2 - Please report me to Lloyds, London.
GW - Man overboard. Please take action to pick him up.	QU - Anchoring is prohibited.	ZL - Your signal has been received but not understood.
JL - You are running the risk of going aground.	QX - I request permission to anchor.

Alpha	Bravo	Charlie	Delta	Echo	Foxtrot

Diver down	Dangerous cargo	Affirmative, yes	Keep clear	Altering course to starboard	Disabled
...
Golf	Hotel	India	Juliet	Kilo	Lima

Want a pilot	Pilot on board	Altering course to port	On fire, keep clear	Desire to communicate	Stop instantly
...
Mike	November	Oscar	Papa	Quebec	Romeo

I am stopped	Negative, no	Man overboard	About to sail	Request pratique	not assigned
...
Sierra	Tango	Uniform	Victor	Whiskey	X-ray

Engines going astern	Keep clear of me	Standing into danger	I require assistance	I require medical assistance	Stop your Intention
...
Yankee	Zulu	1 - One	2 - Two	3 - Three	4 - Four

I am dragging anchor	Require a tug	Numeral 1	Numeral 2	Numeral 3	Numeral 4
...
5 - Five	6 - Six	7 - Seven	8 - Eight	9 - Nine	0 - Zero

Numeral 5	Numeral 6	Numeral 7	Numeral 8	Numeral 9	Numeral 0
...
Answering Pennant	1st Sub	2nd Sub	3rd Sub

Acknowledgement of signals	1st substitute	2nd substitute	3rd substitute