Marine Flags International Code of Signals

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A

"I have a diver d own; keep well clear at slow speed." With three numerals, azimuth or bearing.

B

"I am taking in, or discharging, or carrying dangerous goods. "(Originally used by the Royal Navy specifically for military explosives.)

C

"Affirmative." * ** With three numerals, course in degrees magnetic.

D

"Keep clear of me; I am maneuvering with difficulty."With two, four, or six numerals, date.

E

"I am altering my course to starboard."** Crew at meals

F

"I am disabled; communicate with me." (When flown from an aircraft carrier; "Warning; flight operations underway.")

G

"I require a pilot."When made by fishing vessels operating in proximity of 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.)

H

"I have a pilot on board."

I

"I am altering my course to port."**

J

"I am on fire and have dangerous cargo on board: keep well clear of me, or I am leaking dangerous cargo."

K

"I have a pilot on board."

L

"I have a pilot on board."

M

"My vessel is stopped and making no way through the water."**

N

"Negative."*

O

"Man overboard." **(often attached to the man overboard pole on boats). With a sinister hoist, the semaphore flag.

P

The Blue Peter. 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."

Q

"I am altering my course to starboard."** Crew at meals

R

"The way is off my ship." With one or more numerals, distance (range) in nautical miles.

S

"I am operating astern propulsion." **With one or more numerals, speed in knots.

T

"Keep clear of me; I am engaged in pair trawling."With four numerals, local time. (The first two denote hours and the rest minutes.)

U

"You are running into danger."

V

"I require assistance." With one or more numerals, speed in kilometres per hour.

W

"I require medical assistance."

X

"Stop carrying out your intentions and watch for my signals."

Y

"I am dragging my anchor."
 

Z

"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.)***

 

 

 

 

 

 

 

 

 

 

 

Signal Flags / Numeral Pennants

0 (Zero)

1 (One)

2 (Two)

3 (Three)

4 (Four)

5 (Five)

6 (Six)

7 (Seven)

8 (Eight)

9 (Nine)

 

 

 

 

 

 

 

 

 

 

 

Signal Flags / Substitutes

1st Substitute

 

2nd Substitute

 

3rd Substitute