INTERNATIONAL ONLY Which lights shall a vessel that is constrained by her draft, display, in a vertical line to indicate her condition?

Correct Answer: Option C — Three 360° red lights

Rule 28 mandates that a vessel constrained by her draft shall display three all-round red lights in a vertical line. These lights are intended to signal to other vessels that the displaying ship is limited in her ability to deviate from her course due to her draft.