BOTH INTERNATIONAL & INLAND When two power-driven vessels are crossing, the vessel which has the other to starboard must keep out of the way if __________.

Correct Answer: Option B — the situation involves risk of collision

Rule 15 dictates that when two power-driven vessels are crossing so as to involve risk of collision, the vessel which has the other on her own starboard side shall keep out of the way. Risk of collision is the fundamental trigger for the application of all steering and sailing rules.