USCG Exam PracticeRule 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 under the Inland Rules?
- ✓ She may carry an all-round white light in lieu of the second masthead light and sternlight, placed in the position of the second masthead lightCorrect
- B. She may carry an all-round white light and sidelights in lieu of all other underway lights
- C. She may omit sidelights provided she carries two masthead lights
- D. She may carry a single masthead light in lieu of both masthead lights and the sternlight
Why A 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, placed in the position of the second masthead light and visible at the same minimum range. This substitution applies only on the Great Lakes.
Cited:33 CFR §83.23