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Whistle
Bell
Gong
Part DBasic
Rule 32: Definitions
Defines whistle terminology and timing that gives legal meaning to sound signals.
Detailed Explanation
(a) Whistle means any Annex III-compliant sound signalling appliance.
(b) Short blast means about 1 second.
(c) Prolonged blast means 4 to 6 seconds.
These timings are exam-critical because Rules 34 and 35 depend on them.
Key Points
- Short blast: about 1 second
- Prolonged blast: 4-6 seconds
- Timing distinction defines legal meaning of every signal
Examples
- The OOW orders one short blast (about 1 second) to signal an alteration to starboard. Rule 32(b) defines a short blast as about one second's duration.
- A vessel sounds a prolonged blast lasting approximately 5 seconds before entering a fog bank. Rule 32(c) defines a prolonged blast as 4 to 6 seconds.
Common Mistakes
- Confusing a short blast (about 1 second) with a prolonged blast (4-6 seconds) due to lack of practice.
- Assuming sound signal definitions are approximate guidelines rather than legally defined durations.