USCG Exam Practice · Rule 23 — Power-driven Vessel Underway (lights)
A power-driven vessel of 25 meters in length is operating on the Great Lakes at night. Which substitution is she permitted to make regarding her lights?
- AShe may carry an all-round white light in lieu of her forward masthead light and sidelights
- BShe may carry an all-round white light in lieu of her second masthead light and sternlight✓ correct
- CShe may carry an all-round white light in lieu of her forward masthead light and sternlight
- DShe may carry an all-round white light in lieu of her sidelights and sternlight
Why B is correct
33 CFR §83.23(e) provides that a power-driven vessel operating on the Great Lakes may carry an all-round white light in lieu of the second masthead light and sternlight. The light must be carried in the position of the second masthead light and visible at the same minimum range.
Cited:33 CFR §83.23(e)
Drill more Rule 23 — Power-driven Vessel Underway (lights) questions
Every CaptainsGround answer cites the rule it tests — verified, not guessed. Try a free 5-question drill, no sign-up.
More practice questions
- At night you observe a vessel displaying an all-round flashing yellow light in addition…
- A power-driven vessel of less than 12 meters in length is underway at night. In lieu of…
- A power-driven vessel of 25 meters in length carries two masthead lights. What is the m…
- A power-driven vessel of 60 meters in length is underway. Where must the forward masthe…
- On a power-driven vessel of 20 meters or more in length, the sidelights must be placed …
- A power-driven vessel is operating on the Great Lakes at night. Which substitution for …