BOTH INTERNATIONAL & INLAND Which vessel must show a masthead light abaft of and higher than her identifying lights?

Correct Answer: Option B — A 55-meter vessel trawling

Rule 26(b)(i) requires a vessel engaged in trawling to exhibit two all-round lights in a vertical line (green over white) and, if making way, a masthead light abaft of and higher than the all-round lights. This configuration identifies the vessel's specific activity and its status as a power-driven vessel.