Rules of the Road · Anchored & Aground
A vessel aground at night shall show the anchor lights PLUS:
- ATwo all-round red lights in a vertical line✓ Correct
- BA red flashing light
- CThree all-round red lights in a vertical line
- DA ball-diamond-ball sequence
Explanation
Rule 30(d)(i) requires a vessel aground to show the appropriate anchor lights (one or two all-round white lights) PLUS two all-round red lights in a vertical line. These red lights warn other mariners that the vessel is not merely at anchor but is stranded and completely immovable.
Authority: 72 COLREGS Rule 30(d)(i)
Practice the full Rules of the Road bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Rules of the Road questions
- Anchored & Aground
A vessel at anchor shall show by night:
- Anchored & Aground
A vessel less than 50 meters in length at anchor may, instead of the two prescribed anchor lights, show:
- Anchored & Aground
By day, a vessel aground shall display:
- Anchored & Aground
By day, a vessel at anchor shall display:
- Anchored & Aground
A vessel at anchor in a 'special anchorage area' of less than 100 meters in length is NOT required to show:
- General & Definitions
72 COLREGS apply to vessels upon which waters?