INLAND ONLY When power-driven vessels are in sight of one another, passing signals shall be sounded when __________.

Correct Answer: Option A — meeting or crossing within half a mile of each other

Under Inland Navigation Rules, for the condition where 'When power-driven vessels are in sight of one another, passing signals shall be sounded when', the correct requirement is: 'meeting or crossing within half a mile of each other'. This standard ensures clear navigational intent and collision avoidance.