Alphabetical Flags & Meanings

Flag	Naval Meaning	International Meaning
A	Affirmative	I’ve a diver down keep well clear at slow speed
B	Gunnery practices, Fueling or transferring explosive or fuel	I’m taking, discharging, carrying dangerous cargo
C	Air crafts are to land	Yes, affirmative
D	Delay execution of my signal	Keep well clear of me; I’m maneuvering with difficulty
E	Meal break	I’m altering my course to STBD
F	Flight operations	I’m disabled; communicate with me
G	Guide flag	I require a pilot
H	---	I’ve pilot on-board
I	Going alongside	I’m altering my course to port
J	I’ve a semaphore message to transmit	I’m on fire & I‘ve a dangerous cargo on-board. Keep well clear of me
K	Helicopter operations	I wish to communicate with you
L	Taut wire measuring gears	You should stop your vessel instantly
M	Medical duty ship, stretcher patient and mine laying	My vessel is stopped and making no way        through the water
N	Your movement not understood	Negative
O	Man overboard	Man overboard
P	General recall	At harbor – All personnel should report onboard as vessel is about to proceed at sea At sea – Used as a sound signal to mean I require a pilot
Q	Boat recall	My vessel is healthy and request pratique
R	Replenishing or transferring alongside method, Fueling astern method, Mine sweeping	---
S	Drill signal	I’m operating stern propulsion
T	Time indicator	Keep well clear of me, I’m engaged in pair trawling
U	Anchoring, mooring or weighing	You are running into danger
V	Ship is open for visitors	I require assistance
W	Information addressees	I require medical assistance
X	Exercise	Stop carrying out your intentions and watch for my signals
Y	I’ve a semaphore message to transmit	I’m on fire & I‘ve a dangerous cargo on-board. Keep well clear of me
Z	Gun control	I require a tug