In which situation should a power-driven vessel keep out of the way of a sailing vessel?

The situation in which a power-driven vessel should keep out of the way of a sailing vessel occurs when both vessels are on a collision course. According to the rules of navigation, specifically the International Regulations for Preventing Collisions at Sea (COLREGs), when two vessels are approaching each other in such a manner that a collision may occur, the give-way vessel must take action to avoid the risk of collision.

In this scenario, when both vessels are on a collision course, the power-driven vessel, which is typically more maneuverable due to its propulsion system, is required to take prudent measures to avoid a collision. This obligation stems from the principle that sailing vessels generally do not possess the same level of maneuverability as power-driven vessels, particularly when under sail alone. Thus, the onus is on the more maneuverable vessel to yield in these situations.

The other answer choices do not correctly represent the guiding principles for navigation. For instance, the scenario where the sailing vessel is not making way does not automatically require the power-driven vessel to keep out of the way if it's not in a collision course. Similarly, the requirement to give way is not absolute in all circumstances, as prevailing navigation rules consider the context of both vessels' movements and conditions at sea