BOTH INTERNATIONAL & INLAND While underway and making way your vessel enters fog. Which fog signal should you sound every two minutes?

Correct Answer: Option A — One prolonged blast

Under Inland Navigation Rules, for the condition where 'While underway and making way your vessel enters fog. Which fog signal should you sound every two minutes', the correct requirement is: 'One prolonged blast'. This standard ensures clear navigational intent and collision avoidance.