USCG Exam Practice · Rule 23 — Power-driven Vessel Underway (lights)
A power-driven vessel of 60 meters in length is underway. Where must the forward masthead light be placed relative to the vessel's stem?
- ANot more than one quarter of the vessel's length from the stem
- BNot more than one half of the vessel's length from the stem✓ correct
- CAs far forward as practicable, with no specific limit stated
- DNot more than 50 meters from the stem
Why B is correct
33 CFR §84.03(a) states that the forward masthead light must be placed not more than one half of the length of the vessel from the stem. The one-quarter figure applies to the minimum horizontal distance between the two masthead lights, not the forward light's position relative to the stem.
Cited:33 CFR §84.03(a)
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