Rules of the Road · Light Identification — Towing >200m
At night you see a vessel showing three masthead lights in a vertical line, sidelights, a sternlight, and a yellow towing light above the sternlight. This is a:
- APower-driven vessel over 50 m
- BVessel restricted in ability to maneuver
- CPilot vessel
- DVessel towing astern where the tow exceeds 200 m✓ Correct
Explanation
Three masthead lights in a vertical line indicate a tow exceeding 200 m (two when 200 m or less). The yellow towing light above the white sternlight confirms a vessel towing astern.
Authority: COLREGS/Navigation Rules, Rule 24(a)
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