COLREGs · Rule 3
General Definitions
TL;DR
Defines the key vocabulary used throughout the rules: 'vessel', 'power-driven vessel', 'sailing vessel', 'restricted in ability to maneuver', 'not under command', 'underway', 'restricted visibility', etc.
Why it shows up on the exam
Most exam questions on definitions test 'vessel restricted in ability to maneuver' (RAM) vs 'not under command' (NUC) vs 'constrained by draft' (CBD).
Authoritative source
- 33 CFR §83.03— verbatim Inland Rule text (US Code of Federal Regulations)
- International COLREGs Rule 3 verbatim text is published by the IMO. The Inland counterpart 33 CFR §83 chunk above mirrors the international wording almost verbatim.
Inland parallel
Inland Rule 3 — General Definitions →More from Part A — General
Related drills
- Rule 1 — Application
- Practise Rule 2 — Responsibility
Drill COLREGs Rule 3
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