The Significance of Code Flags (Single Letter)
 | ALFA I have a diver down ; keep well clear at slow speed. ● ━━ |
 | BRAVO I am taking in, or discharging, or carrying dangerous goods. ━━ ● ● ● |
 | CHARLIE Yes (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.” By fishing vessels near fishing grounds: “I am hauling nets”. ━━ ━━ ● |
 | Hotel I have a pilot on board. ● ● ● ● |
 | India I am altering my course to port. ● ● |
 | Juliet I am on fire and have dangerous cargo on board: keep well clear of me. or I am leaking dangerous cargo. ● ━━ ━━ ━━ |
 | Kilo I wish to communicate with you. ━━ ● ━━ |
 | Lima Stop immediately. ● ━━ ● ● |
 | Mike My vessel is stopped and making no way through the water. ━━ ━━ |
 | November Negative. ━━ ● |
 | Oscar Man overboard. ━━ ━━ ━━ |
 | Papa In harbour: All persons should report on board as the vessel is about to proceed to sea. At sea: It may be used by fishing vessels to mean: My nets have come fast upon an obstruction. ● ━━ ━━ ● |
 | Quebec My vessel is ‘healthy’ and I request free pratique. ━━ ━━ ● ━━ |
 | Romeo The way is off my ship; you may feel your way past me. ● ━━ ● |
 | Sierra I am operating astern propulsion.. ● ● ● |
 | Tango Keep clear of me. Fishing boats: Keep clear of me; I am engaged in pair trawling. ━━ |
 | Uniform You are running into danger. ● ● ━━ |
 | Victor I require assistance. ● ● ● ━━ |
 | Whiskey I require medical assistance. ● ━━ ━━ |
 | Xray Stop carrying out your intentions and watch for my signals. ━━ ● ● ━━ |
 | Yankee I am dragging my anchor. ━━ ● ━━ ━━ |
 | Zulu I require a tug. By fishing vessels near fishing grounds: I am shooting nets. ━━ ━━ ● ● |