BOTH INTERNATIONAL & INLAND A power-driven vessel is underway and fishing with trolling lines. This vessel __________.

Correct Answer: Option C — must keep out of the way of sailing vessels

COLREG Rule 18 mandates that a power-driven vessel underway must keep out of the way of a sailing vessel. Even when fishing with trolling lines, a power-driven vessel does not attain the special status of a vessel engaged in fishing under Rule 3(i) and remains burdened.