| Alpha : diver below (when stationary); I am undergoing a speed trial |
| Bravo : I am taking on or discharging explosives |
| Charlie : affirmative |
| Delta : keep clear of me, I am maneuvering with difficulty |
| Echo : I am altering my course to starboard |
| Foxtrot : I am disabled, communicate with me |
| Golf : I require a pilot |
| Hotel : I have a pilot on board |
| India : I am altering my course to port |
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| Juliet : I am going to send a message by semaphore |
| Kilo : you should stop your vessel instantly |
| Lima : you should stop, I have something important to communicate |
| Mike : I have a doctor on board |
| November : no (negative) |
| Oscar : man overboard |
| Papa : all aboard, vessel is about to proceed sea. (At sea) your lights are out or burning badly |
| Quebec : my vessel is healthy and I request free practique |
| Romeo : the way is off my ship. You may feel you way past me |
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| Sierra : my engines are going full speed astern |
| Tango : do not pass ahead of me |
| Uniform : you are standing into danger |
| Victor : require assistance (not in distress) |
| Whiskey : I require medical assistance |
| X-ray : stop carrying out your intentions and watch for my signals |
| Yankee : I am carrying mail |
| Zulu : to be used to address or call shore stations |
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