A "vessel engaged in fishing" includes which of the following?

A "vessel engaged in fishing" encompasses various activities related to catching fish. The correct answer highlights vessels fishing with trolling lines. Trolling involves drawing one or more fishing lines with baited hooks behind a moving boat, typically at slow speeds. This method is recognized as a form of fishing, and vessels using trolling lines are actively engaged in the fishing process.

The other activities mentioned, such as using nets exclusively, anchoring, or traveling to a fishing location, do not necessarily classify a vessel as "engaged in fishing." For example, while anchored vessels may be fishing, the mere act of being anchored does not confirm that fishing is taking place. Similarly, vessels that are simply on their way to a fishing location may not be actively fishing at that time. Thus, the focus on actively using trolling lines distinctly qualifies the vessel as engaged in fishing, making it the correct choice.