BOTH INTERNATIONAL & INLAND Which vessel may show identifying lights when not actually engaged in her occupation?

Correct Answer: Option D — None of the above

Rule 26, 27, and 28 describe lights for vessels engaged in specific operations like fishing, pilotage, or mineclearance. These lights are only to be exhibited when the vessel is actually engaged in that specific occupation. When not so engaged, the vessel must display lights appropriate for her size and propulsion.