BOTH INTERNATIONAL & INLAND You see the display of lights shown in illustration D064RR below. This could indicate which of the following?

Correct Answer: Option C — 65-meter tug towing astern, length of tow 150 meters

Rule 24(a) requires a power-driven vessel towing to show two masthead lights in a vertical line if the length of the tow, measured from the stern of the towing vessel to the after end of the tow, exceeds 200 meters. For a 150-meter tow, only one masthead light is required.