BOTH INTERNATIONAL & INLAND While underway in fog, you hear a prolonged blast from another vessel. This signal indicates a __________.

Correct Answer: Option C — power-driven vessel making way

Under Inland Navigation Rules, for the condition where 'While underway in fog, you hear a prolonged blast from another vessel. This signal indicates a', the correct requirement is: 'power-driven vessel making way'. This standard ensures clear navigational intent and collision avoidance.