BOTH INTERNATIONAL & INLAND When should the fog signal of a manned vessel under tow be sounded?

Correct Answer: Option A — After the towing vessel's fog signal

Under Inland Navigation Rules, for the condition where 'When should the fog signal of a manned vessel under tow be sounded', the correct requirement is: 'After the towing vessel's fog signal'. This standard ensures clear navigational intent and collision avoidance.