THE INTEBNATIONAL CODE OF SIGNALS 625
SINGLE-LETTER HOISTS.
Single-letter hoists relate to important phrases which are in common
use.
Single-letter Signals.
Only those mat bed with an asterisk should be used by flashing
A I am undergoing a speed trial.
B I am taking in or discharging explosives.
C Yes (affirmative).
D Keep clear of me—I am manoeuvring with difficulty.
E I am directing my course to starboard.
*jP I am disabled. Communicate with me.
G I require a pilot.
// I have a pilot on board.
1 I am directing my course to port.
J I am going to send a message by semaphore.
*K You should stop your vessel instantly.
*L You should stop. I have something important to communicate.
M I have a doctor on board.
N No (negative).
*0 Man overboard.
*P IN HABBOUR (Blue Peter)—All persons are to repair on board as
the vessel is about to proceed to sea. (Note: To be hoisted
at the foremast head.)
AT SEA—Your lights are out, or burning badly.
Q My vessel is healthy and I request free pratique.
*R The way is off my ship; you may feel your way past me.
£ My engines are going full speed astern.
T Do not pass ahead of me.
* U You are standing into danger,
*F I require assistance.
*W I require medical assistance.
X Stop carrying out your intentions and watch for my signals.
Y I am carrying mails.
* Z To be used to address or call shore stations.