ICMS — International Code of Signals
Important Flags — Safety and Emergency
O
Oscar
Man overboard
A
Alpha
Diver down — keep clear
V
Victor
I need assistance
W
Whiskey
Medical assistance required
Q
Quebec
I want a health screening
B
Bravo
Dangerous cargo
All Letter Flags
A
Alpha
Diver down — keep clear
B
Bravo
Dangerous cargo
C
Charlie
Yes — affirmative
D
Delta
Difficulty maneuvering — approaching
E
Echo
I am turning to starboard
F
Foxtrot
Disabled — awaiting assistance
G
Golf
I want a guide
H
Hotel
Pilot on board
I
India
Turning to the pier
J
Juliet
Dangerous cargo on fire
K
Kilo
I wish to communicate with you
L
Lima
Stop — wait for signal
M
Mike
My vessel is stopped
N
November
No — negative
O
Oscar
Man overboard
P
Papa
I am about to get underway
Q
Quebec
I want a health screening
R
Romeo
Acknowledgment
S
Sierra
My engines are running astern
T
Tango
Fishing — keep clear
U
Uniform
You are in danger
V
Victor
I need assistance
W
Whiskey
Medical assistance required
X
X-ray
Abandon your intention
Y
Yankee
My anchor is dragging
Z
Zulu
I want a tugboat