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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
Rule 32 defines three timing terms that give precise legal meaning to every sound signal in Rules 34 and 35.
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.