BOTH INTERNATIONAL & INLAND You are on vessel "A" and approaching vessel "B" as shown in illustration D015RR below. You are not sure whether your vessel is crossing or overtaking vessel "B". You should take which of the following actions?

Correct Answer: Option B — consider it to be an overtaking situation

Rule 13(b) states that if there is any doubt as to whether a vessel is overtaking another, she shall assume that this is the case and act accordingly. This conservative approach ensures that the overtaking vessel takes responsibility for the maneuver, preventing confusion and potential collision in close-quarters situations.