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 A — overtaking situation

Rule 13 defines an overtaking situation when coming up with another vessel from a direction more than 22.5 degrees abaft her beam, where at night you would be able to see only the sternlight and no sidelights.