International Maritime Signal Flags
The universal visual communication system for ships at sea.
A
ALPHA
I have a diver down; keep well clear at slow speed.
B
BRAVO
I am taking in, or discharging, or carrying dangerous goods.
G
GOLF
I require a pilot.
H
HOTEL
I have a pilot on board.
O
OSCAR
Man overboard.
Q
QUEBEC
My vessel is healthy and I request free pratique.
V
VICTOR
I require assistance.
W
WHISKEY
I require medical assistance.
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