Rules of the Road · Signals to Attract Attention
Under Rule 36, when may a vessel use any light or sound signal to attract the attention of another vessel?
- AOnly in restricted visibility
- BOnly when in imminent danger of collision
- CAt any time, provided the signal cannot be mistaken for any signal authorized by the Rules✓ Correct
- DOnly to supplement a distress signal
Explanation
Rule 36 permits any vessel to use a light or sound signal to attract another vessel's attention at any time, as long as the signal cannot be confused with an authorized signal. It also allows a searchlight to illuminate a nearby vessel but prohibits directing the searchlight so as to embarrass or impede another vessel.
Authority: 72 COLREGS Rule 36
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