BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown in illustration D017RR below. Vessel "B" is an air-cushion vessel operating in the non-displacement mode. In addition to a steady white light which other light will vessel "A" observe on vessel "B"?

Correct Answer: Option C — Flashing yellow light

Rule 23(b) requires an air-cushion vessel operating in the non-displacement mode to exhibit an all-round flashing yellow light in addition to the lights prescribed for a power-driven vessel. This light serves as a distinctive identification signal for high-speed hovercraft, alerting other vessels to their unique operational characteristics and speed.