USCG USCG ROR
Set 14 • Question #151 of 475
Launch Interactive Practice Room BOTH INTERNATIONAL & INLAND What signal would a vessel aground show during daylight?
A
One black ball
B
Two black balls
C
Three black balls
✓ Correct Answer
D
Four black balls
USCG NMC Regulatory Explanation
Under Rule 30(d), an aground vessel displays anchor lights plus two all-round red lights in a vertical line at night, and three black balls in a vertical line by day.
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