BOTH INTERNATIONAL & INLAND You are aboard vessel "A" , a power-driven vessel, on open waters and vessel "B", a sailing vessel, is sighted off your port bow as shown in illustration D027RR below. Which vessel is the stand-on vessel?

Correct Answer: Option C — Vessel "B" because it is sailing

Rule 18(a)(iv) mandates that a power-driven vessel shall keep out of the way of a sailing vessel. Regardless of the relative bearing or the fact that the power-driven vessel may be to starboard, the sailing vessel is the stand-on vessel because it is not a power-driven vessel.