Which vessel would exhibit sidelights while underway and not making way?

Answer: B — power-driven vessel

A power-driven vessel exhibits sidelights while underway and not making way because sidelights are a requirement for vessels that are actively navigating on the waters. These lights, which include a green light on the starboard side and a red light on the port side, are essential for indicating the vessel’s presence and direction of travel to other vessels, enhancing safe navigation. When a power-driven vessel is underway, it is defined as being on the move with the intention of navigation, regardless of its speed, including situations where it is not making way (not moving through the water). The sidelights remain on to communicate its position to other vessels in the vicinity. In contrast, a vessel at anchor would display an all-around white light, not sidelights. Similarly, while a sailing vessel also has to show sidelights when underway, the question emphasizes a power-driven vessel’s required lights and status. A fishing vessel can also display sidelights but must adhere to the specific requirements of its activity, whether it is fishing or not. Thus, the context of being a power-driven vessel makes it the most accurate answer in this scenario.