Meanings of International Maritime Signal Flags

A
A
A - Diver below (when stationary); I am undergoing a speed trial
N
N
N - no (negative)


B
B
B - I am taking on or discharging explosives
O
O
O - man overboard


C
C
C - Yes (affirmative)
P
P
P - the Blue Peter - all aboard, vessel is about to proceed sea.


D
D
D - keep clear of me, I am manoeuvring with difficulty
Q
Q
Q - my vessel is healthy and I request practique


E
E
E - I am altering my course to starboard
R
R
R - the way is off my ship. You may feel you way past me


F
F
F - I am disabled, communicate with me
S
S
S - my engines are going astern


G
G
G - I require a pilot
T
T
T - keep clear of me


H
H
H - I have a pilot on board
U
U
U - you are standing into danger


I
I
I - I am altering my course to port
V
V
V - I require assistance (not distress)


J
J
J - on fire; keep clear
W
W
W - I require medical assistance


K
K
K - I desire to communicate
X
X
X - stop carrying out your intentions and watch for my signals


L
L
L - you should stop, I have something important to communicate
Y
Y
Y - I am dragging anchor


M
M
M - I am stopped
Z
Z
Z - I require a tug.

Numeric Pennant
0
O
5
5
1
1
6
6
2
2
7
7
3
3
8
8
4
4
9
9

Answering Pennant
Answer
Code and answering pennant
The answering pennant is used as a decimal point when sending numeric data.

Substitute Pennant
Substitute 1
substitute 1
Substitute 2
substitute 2
Substitute 3
substitute 3

Distress
N
C
N + C - I am in distress

Pirate
Jolly Roger
Picaroon, Sea-Rat

Polfracht