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Maritime Communication Week 8 Single Letter Signals Between Icebreaker and Assisted Vessels

This document outlines single letter signals used between icebreakers and assisted vessels during icebreaking operations. Some key signals include: WM - Icebreaker support is commencing, watch for signals. WO - Icebreaker support has finished, proceed to destination. A - Icebreaker instructing vessel to go ahead along ice channel. G - Icebreaker going ahead, instructing vessel to follow. The document provides the meaning of several other signals related to speed, distance, stopping, and towing instructions between icebreakers and assisted vessels. Compliance with international regulations for collision prevention is still required.

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Kristine Morilla
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1K views2 pages

Maritime Communication Week 8 Single Letter Signals Between Icebreaker and Assisted Vessels

This document outlines single letter signals used between icebreakers and assisted vessels during icebreaking operations. Some key signals include: WM - Icebreaker support is commencing, watch for signals. WO - Icebreaker support has finished, proceed to destination. A - Icebreaker instructing vessel to go ahead along ice channel. G - Icebreaker going ahead, instructing vessel to follow. The document provides the meaning of several other signals related to speed, distance, stopping, and towing instructions between icebreakers and assisted vessels. Compliance with international regulations for collision prevention is still required.

Uploaded by

Kristine Morilla
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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SOUTHWESTERN COLLEGE OF MARITME, BUSINESS AND TECHNOLOGY INC.

Address: Quezon Dr, Calapan, Oriental Mindoro


Phone: (043) 288 3038

MARITIME COMMUNICATION

WEEK 8

SINGLE LETTER SIGNALS BETWEEN ICEBREAKER AND ASSISTED VESSELS

The following single letter signals, when made between an icebreaker and assisted vessels,
have only the significations given in this table and are only to be made by sound, visual, or
radiotelephony signals.

WM Icebreaker support is now commencing. Use special icebreaker support signals and keep
continuous watch for sound, visual, or radiotelephony signals.

WO Icebreaker support is finished. Proceed to your destination.


Code Letters or Ice breaker Assisted Vessel(s)
Numerals
A•– Go ahead (proceed along the ice channel). I am going ahead (I am
proceeding along the ice
channel).
G––• I am going ahead; follow me. I am going ahead; I am following you.
J•––– Do not follow me (proceed along the ice channel). I will not follow you (I will
proceed along the ice channel).
P•––• Slow down. I am slowing down.
N–• Stop your engines. I am stopping my engines.
H•••• Reverse your engines. I am reversing my engines.
L•–•• You should stop your vessel instantly. I am stopping my vessel.
4 • • • • – Stop. I am icebound. Stop. I am
icebound.
Q––•– Shorten the distance between vessels. I am shortening the distance.
B–••• Increase the distance between vessels. I am increasing the distance.
5 • • • • • Attention. Attention.
Y–•–– Be ready to take (or cast off) the towline. I am ready to take (or cast off)
the towline.
Notes:
1. The signal “K”– • – by sound or light may be used by an icebreaker to remind ships of their
obligation to listen continuously on their radio.
2. If more than one vessel is assisted, the distances between vessels should be as constant as
possible. Watch speed of your own vessel and vessel ahead; should speed of your own vessel
go down, give attention signal to the following vessel.
3. The use of these does not relieve any vessel from complying with the International
Regulations for Preventing Collisions at Sea.
4. • • – • • Stop your headway (given only to a ship in an I am stopping
headway.
ice-channel ahead of and approaching or going
away from icebreaker).
Note: This signal should not be made by radiotelephone

5. Single-letter signals which may be used during icebreaking operations:


* E • I am altering my course to starboard.
* I • • I am altering my course to port.
* S • • • I am operating astern propulsion.
M – – My vessel is stopped and making no way through the water.

Notes: 1. Signals of letters marked by an asterisk*, when made by sound, may only be made
in compliance with the requirements of the International Regulations for
Preventing Collisions at Sea.
2. Additional signals for icebreaking support can be found in Chapter 2.

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