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Part D — Sound & Light SignalsSound
32
Definitions (sound signals)
In plain language
'Whistle' means any sound signalling appliance capable of producing the prescribed blasts and complying with Annex III. A short blast is about one second; a prolonged blast is four to six seconds.
Full text of Rule 32
(a)
The word “whistle” means any sound signalling appliance capable of producing the prescribed blasts and which complies with the specifications in Annex III to these Regulations.
(b)
The term “short blast” means a blast of about one second’s duration.
(c)
The term “prolonged blast” means a blast of from four to six seconds’ duration.
Reproduced from the COLREGs 1972 (as amended) for study. Always verify against the official IMO publication.
Key points
- 1
Short blast — about 1 second.
- 2
Prolonged blast — 4 to 6 seconds.
- 3
The whistle must meet the specifications in Annex III.
Opened — marked studiedNew