Rules of the Road · Light Identification — Pilot
A vessel showing an all-round white light over an all-round red light at the masthead, plus sidelights and a sternlight when underway, is a:
- APilot vessel on pilotage duty✓ Correct
- BVessel not under command
- CVessel constrained by draft
- DFishing vessel
Explanation
White-over-red ('white over red, pilot ahead') at or near the masthead marks a pilot vessel engaged on pilotage duty. Underway she adds sidelights and sternlight; at anchor she shows the pilot lights plus anchor light(s).
Authority: COLREGS/Navigation Rules, Rule 29
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