USCG Exam PracticeRule 23 — Power-driven Vessel Underway (lights)
A power-driven vessel of 40 meters in length carries two masthead lights. What is the minimum required horizontal distance between those two lights?
- ✓ 10 metersCorrect
- B. 20 meters
- C. 50 meters
- D. The forward light need only be placed forward of amidships; no minimum horizontal separation applies
Why A is correct
33 CFR §84.03(a) requires the horizontal distance between two masthead lights to be not less than one quarter of the vessel's length. One quarter of 40 meters is 10 meters. The 50-meter figure is the maximum, not the minimum.
Cited:33 CFR §84.03(a)