Rule text#
Source
Verbatim 33 CFR §83.32 as published in the Code of Federal Regulations — public domain, retrieved 2026-05-16.
(a)The wordmeans any sound signaling appliance capable of producing the prescribed blasts and which complies with specifications in Annex III to these Rules (33 CFR part 86).
(b)The termmeans a blast of about 1 second's duration.
(c)The termmeans a blast of from 4 to 6 seconds' duration.
Authoritative source#
Source links checked against the current public rule corpus on 2026-05-16.
- 33 CFR §83.32 — the section this text comes from, with its neighbours.
- The Inland Navigation Rules are codified at 33 CFR Part 83 and are public domain. The international COLREGs text is published separately by the IMO.
Practice this rule#
One real exam question on this rule, cited to source. No sign-up.
A 'short blast' on a whistle is a blast of ______.
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