BOTH INTERNATIONAL & INLAND At night, power-driven vessels less than 12 meters in length may, instead of the underway lights for vessels under 50 meters, show which lights?

Correct Answer: Option C — One all-round white light and sidelights

Rule 23(d)(i) permits a power-driven vessel of less than 12 meters in length to exhibit an all-round white light and sidelights instead of the separate masthead, stern, and sidelights required for larger vessels, simplifying the lighting configuration for smaller craft.