INTERNATIONAL ONLY If a vessel displays three all-round red lights in a vertical line at night, during the day which shape(s) may she show?

Correct Answer: Option A — A cylinder

Rule 27(b) states that a vessel restricted in her ability to maneuver shall display three all-round lights in a vertical line, the highest and lowest being red and the middle white. However, a vessel constrained by her draft displays a cylinder by day, per Rule 28.