A power-driven vessel is underway and fishing with trolling lines. This vessel __________.

The correct answer is that the power-driven vessel fishing with trolling lines must keep out of the way of sailing vessels, as outlined in the Rules of the Road. Under the maritime navigation rules, power-driven vessels are generally obligated to give way to sailing vessels that are under sail, as they are considered to have the right of way. This is to ensure safe navigation and to prevent collisions, especially in situations where sailing vessels may have limited maneuverability compared to power-driven vessels.

The ruling is rooted in the priority given to sailing vessels, allowing them safe passage. By keeping a safe distance, the power-driven vessel can avoid endangering the sailing craft, which may rely solely on its sails for movement.

In contrast, while there are considerations for other types of vessels, such as anchored or non-motorized vessels, the specific priority given to sailing vessels emphasizes the responsibility of powered vessels to be cautious and respectful in these scenarios. Thus, the power-driven boat must be vigilant and yield to sailing vessels to maintain safety in navigation.