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International code of signals



letters
phonetic alphabet
meanings
A
Alfa
 Diver below, OR undergoing speed trial
B
Bravo
 taking or discharging explosives
C
Charlie
 Affirmative/Yes
D
Delta
 Keep clear; Maneuvering with difficulty
E
Echo
 Altering course to starboard
F
Foxtrot
 Disabled, communicate with me
G
Golf
 Need a pilot
H
Hotel
 I have a pilot
I
India
 Altering course to port
J
Juliette
 I will send you message by semaphore; On fire with dangerous cargo, keep clear
K
Kilo
 You should stop your vessel instantly. Wish to communicate
L
Lima
 You should stop, I have something important to communicate
M
Mike
 I have a doctor on board. Stopped and makingno way through the water
N
November
 Negative/No
O
Oscar
 Man overboard
P
Papa
 "The Blue Peter" All aboard, vessel is about to proceed. At sea: your lights are out or burning badly
Q
Quebec
 My vessel is healthy and I request free practique
R
Romeo
 The way is off my ship. You may feel your way past me
S
Sierra
 My engines are going full speed astern
T
Tango
 Do not pass ahead of me, Keep clear, engaged in pair trawling
U
Uniform
 You are coming into danger
V
Victor
 I require assistance (not distress)
W
Whiskey
 I require medical assistance
X
X-ray
 Stop what you're doing and watch for my signals
Y
Yankee
 I am carrying mails; dragging my anchor
Z
Zulu
 To be used to address or call shore stations. Require tug


flags codes

signal flags
meanings
NC
I am in distress
AC
I am abandoning my vessel
AN
I need a doctor
BR
I require a helicopter
CD
I require immediate assistance
DV
I am drifting
EF
SOS/MAYDAY has been canceled
FA
Will you give me my position?
GW
Man overboard. Please take action to pick him up
JL
You are running the risk of going aground
LO
I am not in my correct position: used by a light vessel
PD
Your navigation lights are not visible
PP
Keep well clear of me
RU
Keep clear of me; I am maneuvering with difficulty
QD
I am going ahead
QQ
I require health clearance
QT
I am going astern
QU
Anchoring is prohibited
QX
I request permission to anchor
SO
You should stop your vessel instantly
UM
The Harbor is closed to traffic
UP
Permission to enter Harbor is urgently requested. I have an emergency
YU
I am going to communicate with your station by means of the International Code of Signals
ZL
Your signal has been received but not understood.