USCG Exam PracticeRule 27 — NUC and RAM (lights)
A vessel engaged in mine clearance operations exhibits three all-round green lights. What does this signal indicate to other mariners?
- ✓ It is dangerous for another vessel to approach within 1000 meters of the mine clearance vesselCorrect
- B. The vessel is restricted in her ability to maneuver and has a clear passage on both sides
- C. The vessel is not under command and requires assistance
- D. The vessel is engaged in underwater operations with a diver deployed
Why A is correct
33 CFR §83.27(f) states that the three all-round green lights (or three balls) exhibited by a mine clearance vessel indicate that it is dangerous for another vessel to approach within 1000 meters. These lights are not distress signals and do not indicate NUC status.
Cited:33 CFR §83.27