BOTH INTERNATIONAL & INLAND Which lights shall a power-driven vessel towing another vessel astern (tow less than 200 meters) show?

Correct Answer: Option C — two masthead lights in a vertical line instead of either the forward or after masthead lights

Rule 24(a) requires a power-driven vessel towing astern to exhibit two masthead lights in a vertical line instead of the forward masthead light. This specific light configuration serves as a primary identifier for a towing vessel, distinguishing it from other power-driven vessels underway in the vicinity.