Question 426 Rules of the Road

The correct answer is D) A tug with a tow alongside. The lights shown in illustration D055RR indicate a tug vessel with a tow alongside. This configuration is specified in the International Regulations for Preventing Collisions at Sea (COLREGS), which govern maritime navigation rules. Specifically, Rule 24(c) states that a power-driven vessel pushing ahead or towing alongside shall exhibit the same lights as a power-driven vessel underway, with the addition of a special flashing or all-round white light at or near the stern. The other options are incorrect because they do not match the light configuration shown in the illustration. A tug not under command would not have this specific light arrangement, and a vessel fishing at anchor or a pipeline would not be displaying these navigation lights.