INLAND ONLY The masthead light may be located at other than the fore and aft centerline on which power-driven vessel?

Correct Answer: Option C — less than 12 meters in length

33 CFR 83.23 (Rule 23) allows a power-driven vessel of less than 12 meters in length to carry her masthead light off the centerline if centerline placement is not practicable, provided the sidelights are combined in a single lantern carried on the vessel's fore and aft centerline.