BOTH INTERNATIONAL & INLAND A vessel engaged in fishing while at anchor shall sound a fog signal of __________.
Official USCG Answer & Rule Citation
Correct Answer: Option A — one prolonged and two short blasts at two-minute intervals
Per COLREGS Rule 35(e), a vessel engaged in fishing, whether underway or at anchor, shall sound one prolonged and two short blasts at intervals not exceeding two minutes. This identifies the vessel's specialized status in restricted visibility.
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