Rules of the Road · Lookout & Safe Speed
Under 72 COLREGS Rule 5, a proper lookout shall be maintained:
- ABy sight and hearing only when visibility is reduced below 1 nautical mile
- BBy sight and hearing at all times, using all available means appropriate to the prevailing circumstances✓ Correct
- CBy radar when operating in restricted visibility and by visual means at all other times
- DBy the officer of the watch, supplemented by radar as required by flag state regulations
Explanation
Rule 5 requires a proper lookout by sight AND hearing at ALL times, using ALL available means appropriate to the prevailing circumstances and conditions. This is an absolute, continuous duty — not conditional on visibility conditions — and 'all available means' includes radar, AIS, and other technology.
Authority: 72 COLREGS Rule 5
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