USCG Exam PracticeRule 23 — Power-driven Vessel Underway (lights)
When two masthead lights are prescribed for a power-driven vessel, what is the required minimum horizontal distance between them, and what is the maximum?
- A. Not less than one-half the vessel's length; no maximum specified
- ✓ Not less than one-quarter the vessel's length; need not exceed 50 metersCorrect
- C. Not less than one-quarter the vessel's length; need not exceed 100 meters
- D. Not less than 10 meters; need not exceed 50 meters
Why B is correct
33 CFR §84.03(a) specifies that the horizontal distance between two masthead lights must not be less than one quarter of the vessel's length but need not be more than 50 meters. Additionally, the forward light must be placed not more than one half of the vessel's length from the stem.
Cited:33 CFR §84.03(a)