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This part outlines the rules for the sounds used when signalling manoeuvres and during restricted visibility (fog signals).
Bells, gongs, whistles and lights make up the various combinations of signals available. However, most of the time, the only signal we’ll use or hear is a whistle. Unfortunately, the term whistle is a little misleading, as it refers to any sound signalling appliance, usually a horn. Bells and gongs are reserved for longer vessels to indicate their length when anchored in restricted visibility.
Signals are broken into three categories:
Manoeuvring & warning
These signals are focused on communication. They allow vessels to communicate their intentions, ask a question of another vessel, or reply to confirm their understanding of the situation.
Restricted visibility
The sound signals used in restricted visibility replace what would otherwise be visible by day, using shapes, or night using lights. The rule book’s definitions and application fundamentally change in restricted visibility
Attracting attention & distress
Lastly, are signals used to attract attention or indicate distress. The distress signals are found in annex IV of the rules, which includes the Mayday message, VHF DSC, and EPRIB, among some of the more old-fashioned methods.
If necessary to attract the attention of another vessel any vessel may make light or sound signals that cannot be mistaken for any signal authorised elsewhere in these Rules, or may direct the beam of her searchlight in the direction of the danger, in such a way as not to embarrass any vessel. Any light…
When a vessel is in distress and requires assistance she shall use or exhibit the signals described in Annex IV to these Regulations. Distress signals The distress signal rule directs you to ANNEX IV: Distress Signals of the regulations. This is the complete list of distress signals, including Mayday radio calls, electronic search and rescue…
Bells, gongs, whistles and lights make up the various combinations of signals available. However, most of the time, the only signal we’ll use or hear is a whistle. Unfortunately, the term whistle is a little misleading, as it refers to any sound signalling appliance, usually a horn. Bells and gongs are reserved for longer vessels…
Manoeuvring signals are among the more commonly heard sounds around a busy harbour. These are usually not directly aimed at recreational vessels but can be helpful as they give an idea of what a commercial vessel is up to and, if applicable, help with our give-way duties. When in sight of one another, manoeuvring signals…
In or near an area of restricted visibility, whether by day or night, the signals prescribed in this Rule shall be used as follows: Restricted visibility has its own rule (Rule 19: Conduct of vessels in restricted visibility), which covers the required conduct of vessels and refers to the appropriate sound signals to be made…
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