Flags - Signal Code Message Definitions
| Letter/Number | Signal Flags | Signal Flag Meanings | Yacht / Dinghy Racing Signal Meanings |
|---|---|---|---|
| A |  |
Diver below (when stationary); I am undergoing a speed trial | |
| B |  |
I am taking on or discharging explosives | Protest |
| C |  |
Yes (affirmative) | Position of next mark has been changed |
| D |  |
Keep clear of me, I am manoevering with difficulty | Don't launch/follow this rib |
| E |  |
I am altering my course to starboard | |
| F |  |
I am disabled, communicate with me | |
| G |  |
I require a pilot | |
| H |  |
I have a pilot on board | |
| I |  |
I am altering my course to port | Round the ends |
| J |  |
I am going to send a message by semaphore | |
| K |  |
You should stop your vessel instantly | |
| L |  |
You should stop, I have something important to communicate | Change to SIs or other amendment |
| M |  |
I have a doctor on board | There is a mark missing |
| N |  |
No (negative) | Abandon |
| O |  |
Man overboard | Rule 42 is waived |
| P |  |
The Blue Peter - all aboard, vessel is about to proceed sea. (At sea) your lights are out or burning badly | Preparatory |
| Q |  |
My vessel is healthy and I request free practique | |
| R |  |
The way is off my ship. You may feel you way past me | Rule 42 is restored |
| S |  |
My engines are going full speed astern | shortened course |
| T |  |
Do not pass ahead of me | |
| U |  |
You are standing into danger | One step less stringent than a black flag, allows boats back in after a general recall or abandonment |
| V |  |
I require assistance (not distress) | |
| W |  |
I require medical assistance | |
| X |  |
Stop carrying out your intentions and watch for my signals | Individual recall |
| Y |  |
I am carrying mail | Lifejackets must be worn |
| Z |  |
To be used to address or call shore stations | 20% scoring penalty |
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1st Subsititute | ||
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2nd Subsititute | ||
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3rd Subsititute | ||
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Answer | Postponement | |
| 0 |  |
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| 1 |  |
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| 9 |  |