BOTH INTERNATIONAL & INLAND You are underway on vessel "B" approaching vessel "A" as shown in illustration D038RR below. You are unable to see any sidelights on vessel "A". What type of situation is this?

Correct Answer: Option D — overtaking situation

Rule 13 defines an overtaking situation as one where a vessel approaches another from a direction more than 22.5 degrees abaft her beam. In this position, the overtaking vessel can only see the sternlight of the vessel being overtaken, and no sidelights are visible to the overtaking vessel.