USCG USCG ROR
Set 1 • Question #16 of 475
Launch Interactive Practice Room INLAND ONLY Whistle signals shall be exchanged by vessels in sight of one another when __________.
A
they are passing within half a mile of each other
✓ Correct Answer
B
passing agreements have been made by radio
C
course changes are necessary to pass
D
doubt exists as to which side the vessels will pass on
USCG NMC Regulatory Explanation
Under Inland Navigation Rules, for the condition where 'Whistle signals shall be exchanged by vessels in sight of one another when', the correct requirement is: 'they are passing within half a mile of each other'. This standard ensures clear navigational intent and collision avoidance.
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