BOTH INTERNATIONAL & INLAND A vessel is overtaking when she can see which light(s) of a vessel ahead?

Correct Answer: Option D — Only the stern light of the vessel

Rule 13(b) defines an overtaking situation by the visual aspect of the vessel being overtaken. A vessel is overtaking when she can only see the stern light of the vessel ahead, meaning she is coming up from a direction more than 22.5 degrees abaft her beam.