BOTH INTERNATIONAL & INLAND A vessel showing a green light over a white light in a vertical line above the level of the sidelights is __________.

Correct Answer: Option D — trawling

Under Inland Navigation Rules, for the condition where 'A vessel showing a green light over a white light in a vertical line above the level of the sidelights is', the correct requirement is: 'trawling'. This standard ensures clear navigational intent and collision avoidance.