USCG Exam PracticeRule 28 — Constrained by Draft (lights)
A vessel engaged in mine clearance operations is underway. In addition to the lights prescribed for a power-driven vessel underway, she exhibits three all-round green lights. What is the significance of these lights, and at what distance is it considered dangerous for another vessel to approach?
- A. They indicate a vessel restricted in ability to maneuver; 500 meters
- ✓ They indicate mine clearance operations; 1000 metersCorrect
- C. They indicate a vessel not under command; 1000 meters
- D. They indicate mine clearance operations; 500 meters
Why B is correct
33 CFR §83.27(f) requires a vessel engaged in mine clearance operations to exhibit three all-round green lights (or three balls by day) in addition to her normal underway lights. These signals indicate that it is dangerous for another vessel to approach within 1000 meters of the mine clearance vessel.
Cited:33 CFR §83.27