BOTH INTERNATIONAL & INLAND The lights shown in illustration D058RR below represent which of the following?

Correct Answer: Option A — a power-driven vessel of less than 50 meters in length

Rule 23(a) requires a power-driven vessel underway to exhibit a masthead light, sidelights, and a sternlight. Because she is less than 50 meters in length, she is only required to carry one masthead light, matching the configuration shown in illustration D058RR.