USCG Exam Practice · Rule 23 — Power-driven Vessel Underway (lights)
At night you observe a vessel displaying an all-round flashing yellow light in addition to the lights of a power-driven vessel underway. This vessel is most likely operating as which type of craft?
- AA WIG craft taking off from the water surface
- BAn air-cushion vessel in the non-displacement mode✓ correct
- CA vessel engaged in towing with a tow exceeding 200 meters
- DA power-driven vessel of less than 12 meters in length
Why B is correct
33 CFR §83.23(b) requires an air-cushion vessel operating in the non-displacement mode to exhibit an all-round flashing yellow light in addition to the standard power-driven vessel lights. A WIG craft exhibits an all-round flashing red light, not yellow, per §83.23(c).
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