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

Correct Answer: Option A — A stern light only

Rule 13 defines an overtaking situation as approaching from more than 22.5 degrees abaft the beam. At night, a vessel in this position can only see the stern light of the vessel being overtaken, as the sidelights and masthead lights are obscured by the vessel's own structure.