When encountering another power vessel at night and seeing red, green, and white lights, what should both vessels do?

When encountering another power vessel at night and seeing red, green, and white lights, the correct action is for both vessels to give way. This situation typically indicates that one vessel is meeting another head-on or nearly head-on. The red and green lights indicate the port (left) and starboard (right) sides of each vessel, while the white light is usually the stern light. According to nautical rules, when two power-driven vessels are approaching each other and the navigation lights are visible as described, they must take steps to avoid a collision.

In this case, both vessels should give way to each other, as doing so allows for safe navigation and prevents accidents. The rules of the road at sea facilitate safe encounters between vessels by requiring them to maneuver appropriately when they see each other's navigation lights.

Other options like one vessel standing on might not be appropriate as both vessels need to be proactive to prevent potential collisions, and simply turning right or speeding up does not guarantee safe passage. In fact, speeding up could lead to more dangerous situations. Hence, the requirement for both vessels to give way ensures a cooperative approach to safe navigation at night.