Have diver down, keep clear
Wish to communicate
You are running into danger
My vessel is stopped, making no way
Require medical assistance
Keep clear, maneuvering with difficulty
Stop your intentions, watch for signals
Altering course to starboard
Dragging my anchor
Disabled, communicate with me
HARBOR: All persons report on board
FISHING: Nets on obstruction
Require a tug
FISHING: Shooting nets
Require a pilot FISHING: Hauling nets
Request free pratigue
Pilot on board
(Procedure Signal) Received
Altering course to port
Engines going astern
On fire, have dangerous cargo, keep clear
Keep clear, engaged in pair trawling
(Answering point or decimal)
Any extensive use of the International Code flags will call for
the use of International Code of Signals, published by the
U.S. Naval Oceanographic Office. A few of the principal signals and
the general method of making and answering signals are given here.
HOW TO MAKE A SIGNAL. If you want to make a signal, hoist your
ensign with the code flag under it. If more than one vessel or
signal station is in sight and your signal is intended for a
particular vessel or signal station, indicate which vessel or signal
station you are addressing by making the distinguishing signal
(i.e., the signal letters) of the vessel or station with which you
want to communicate. If you don't know the distinguishing signal,
observe that ships will answer with their distinguishing signal
hoists or answering pennant.
When you have been answered by the vessel you are addressing,
proceed with your signal, first hauling down your code flag. It may
be required for making or answering signals.
Signals should always be hoisted where they can be best seen, not
necessarily at the masthead. Each hoist should be kept flying until
the other ship hoists her answering pennant close up. When finished
signaling, haul down your ensign.
HOW TO ANSWER A SIGNAL. On seeing a signal made by another ship,
hoist your answering pennant at the dip. (A flag is at the dip when
it is hoisted about three-quarters up its halyard.)
Always hoist the answering pennant where it can be seen best.
When the hoist has been recognized and is understood, hoist your
answering pennant close up, and keep it there until the other ship
hauls her hoist down. Then haul your answering pennant down to the
dip and wait for the next hoist.
If the other ship's flags cannot be made out or the signal is not
understood, keep your answering pennant at the dip, and make a
signal to that effect. When she has repeated or clarified her
signal, hoist your answering pennant close up.