INTERNATIONAL ONLY Which lights is a 45-meter power-driven vessel pushing ahead or towing alongside required to display?

Correct Answer: Option C — Two masthead lights in a vertical line

Rule 24(c) applies to all power-driven vessels pushing ahead or towing alongside, regardless of length. Two masthead lights in a vertical line are required to indicate the towing status. The 45-meter length does not exempt the vessel from this specific identification requirement under the International Rules.