USCG Exam Practice · Rule 28 — Constrained by Draft (lights)
At night, a vessel engaged in dredging operations that is restricted in her ability to maneuver has an obstruction on her port side. Which lights does she exhibit to indicate the side on which another vessel may pass?
- ATwo all-round red lights in a vertical line on the starboard side
- BTwo all-round green lights in a vertical line on the starboard side✓ correct
- CTwo all-round white lights in a vertical line on the starboard side
- DTwo all-round red lights in a vertical line on the port side
Why B is correct
33 CFR §83.27(d)(i) requires two all-round red lights in a vertical line on the side where the obstruction exists (port), and §83.27(d)(ii) requires two all-round green lights in a vertical line on the side where another vessel may pass (starboard). Green indicates the safe passing side.
Cited:33 CFR §83.27
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