BOTH INTERNATIONAL & INLAND While underway at night you are coming up on a vessel from astern. Which light(s) would you expect to see?

Correct Answer: Option A — A stern light only

Under COLREGS Rule 27 and Rule 13, an overtaking vessel approaches from more than 22.5 degrees abaft the beam. At night, seeing only the stern light means you are directly astern within the specified 135-degree sector showing astern, as sidelights are not visible from this relative bearing.