The system of international maritime signal flags is a way of representing individual letters of the alphabet in signals to or from ships. It is a component of the International Code of Signals. Nautical signal flags can be used in various methods:
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Letter |
Flag |
Meaning |
Buy Flags |
A Alfa |
I have a diver down; keep well clear at slow speed. With three numerals, azimuth or bearing. |
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B Bravo |
I am taking in, or discharging, or carrying dangerous goods. (Originally used by the Royal Navy specifically for military explosives.) |
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C Charlie |
Affirmative. With three numerals, course. |
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D Delta |
Keep clear of me; I am maneuvering with difficulty. With two, four, or six numerals, date. |
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E Echo |
I am altering my course to starboard. |
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F Foxtrot |
I am disabled; communicate with me. |
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G Golf |
I require a pilot. When made by fishing vessels operating in close proximity on the fishing grounds it means: "I am hauling nets". With four or five numerals, longitude. (The last two numerals denote minutes and the rest degrees.) |
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H Hotel |
I have a pilot on board. |
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I India |
I am altering my course to port. |
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J Juliet |
I am on fire and have dangerous cargo on board: keep well clear of me, or I am leaking dangerous cargo. |
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K Kilo |
I wish to communicate with you. With one numeral, I wish to communicate with you by; 1) Morse signalling by hand-flags or arms; 2) Loud hailer (megaphone); 3) Morse signalling lamp; 4) Sound signals. |
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L Lima |
In harbor: The ship is under Quarantine. At sea: You should stop your vessel instantly. With four numerals, latitude. (The first two denote degrees and the rest minutes.) |
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M Mike |
My vessel is stopped and making no way through the water. |
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N November |
Negative. |
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O Oscar |
Man overboard (often attached to the man overboard pole on boats). |
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P Papa |
The Blue Peter. In harbor: 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". |
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Q Quebec |
My vessel is "healthy" and I request free pratique. |
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R Romeo |
The way is off my ship. With one or more numerals, distance in nautical miles. |
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S Sierra |
I am operating astern propulsion. With one or more numerals, speed in knots. |
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T Tango |
Keep clear of me; I am engaged in pair trawling. With four numerals, local time. (The first two denote hours and the rest minutes.) |
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U Uniform |
You are running into danger. |
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V Victor |
I require assistance. With one or more numerals, speed in kilometers per hour. |
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W Whiskey |
I require medical assistance. |
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X Xray |
Stop carrying out your intentions and watch for my signals. |
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Y Yankee |
I am dragging my anchor. |
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Z Zulu |
I require a tug. When made by fishing vessels operating in close proximity on the fishing grounds it means: "I am shooting nets". With one or more numerals, time (UTC). (The first two denote hours and the rest minutes.) (Origin of the phrase 'Zulu Time'.) |
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* N and C together (No and Yes) is used as a distress signal.
Number |
International Code Signal |
Buy International Code Signal Pennant with: |
NATO(Custom Order) |
Russian(Custom Order) |
0 Zero |
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1 One |
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2 Two |
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3 Three |
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4 Four |
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5 Five |
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6 Six |
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7 Seven |
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8 Eight |
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9 Nine |
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Signal |
Flag |
Meaning |
Buy Flag: |
First Substitute |
Repeat of the first flag in the hoist |
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Second Substitute |
Repeat of the second flag in the hoist |
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Third Substitute |
Repeat of the third flag in the hoist |
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Fourth Substitute |
Repeat of the fourth flag in the hoist |
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ANS |
Code/Answer |
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CORPEN |
Course Pennant |
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DESIG |
Designation |
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DIV |
Division |
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EMERG |
Emergency |
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FORM |
Formation |
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FLOT |
Group |
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NEGAT |
Negation |
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PORT |
Port |
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PREP |
Preparatory |
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INT |
Question |
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SCREEN |
Screen |
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SPEED |
Speed |
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SQUAD |
Squadron |
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STBD |
Starboard |
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STATION |
Station |
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SUBDIV |
Subdivision |
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TURN |
Turn |
Purchase the complete Storm Warning Flag set here. For Beach Warning Flags click here.
Flag |
Meaning |
Buy Flag: |
Storm Warning / Tropical Storm Warning |
Buy with Grommets | |
Hurricane Warning / Hurricane Force Wind Warning |
Buy with Grommets | |
Small Craft Advisory |
Buy with Grommets | |
Gale Warning / Gale Force Wind Warning |
Buy with Grommets |
This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "International Maritime Signal Flags".