BOTH INTERNATIONAL & INLAND The maximum length of a power-driven vessel which may show an all-round white light and sidelights instead of a masthead light, sidelights and a stern light is __________.

Correct Answer: Option C — 11.9 meters

COLREGS Rule 23(c)(i) allows power-driven vessels of less than 12 meters in length to exhibit an all-round white light and sidelights instead of the traditional masthead lights, sidelights, and stern light, setting the maximum regulatory length limit strictly at 11.9 meters.