USCG USCG ROR
Set 9 • Question #467 of 475
Launch Interactive Practice Room BOTH INTERNATIONAL & INLAND While underway in fog you hear a whistle signal consisting of one prolonged blast followed immediately by two short blasts. This signal is sounded in fog by __________.
A
vessels at anchor, not engaged in fishing
B
vessels underway and towing
✓ Correct Answer
C
vessels in danger
D
pilot vessels
USCG NMC Regulatory Explanation
Under Inland Navigation Rules, for the condition where 'While underway in fog you hear a whistle signal consisting of one prolonged blast followed immediately by two short blasts. This signal is sounded in fog by', the correct requirement is: 'vessels underway and towing'. This standard ensures clear navigational intent and collision avoidance.
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