USCG Exam Practice · Rule 23 — Power-driven Vessel Underway (lights)
A WIG craft is in flight near the surface at night. In addition to the lights prescribed for a power-driven vessel underway in Rule 23(a), what additional light must she exhibit, and under what condition?
- AAn all-round flashing yellow light, exhibited at all times when underway
- BA high intensity all-round flashing red light, exhibited only when taking off, landing, and in flight near the surface✓ correct
- CA high intensity all-round flashing red light, exhibited at all times when underway
- DAn all-round flashing yellow light, exhibited only when taking off and landing
Why B is correct
33 CFR §83.23(c) requires a WIG craft to exhibit a high intensity all-round flashing red light in addition to the standard power-driven vessel lights, but only when taking off, landing, and in flight near the surface — not at all times. The all-round flashing yellow light is prescribed for air-cushion vessels in non-displacement mode under §83.23(b), not for WIG craft.
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