USCG USCG ROR
Set 1 • Question #9 of 475
Launch Interactive Practice Room INLAND ONLY Which signal must a power-driven vessel give, in addition to one prolonged blast, when backing out of a berth with another vessel in sight?
A
2 short blasts
B
1 blast
C
3 short blasts
✓ Correct Answer
D
4 blasts
USCG NMC Regulatory Explanation
Under 33 CFR 83.34(a) (Inland Rules), a power-driven vessel leaving a dock or berth sounds one prolonged blast followed by three short blasts for astern propulsion to alert nearby traffic of its maneuvering state.
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