What type of light should be displayed by a power-driven vessel underway?

A power-driven vessel that is underway is required to display specific navigation lights to ensure that it is visible to other vessels and to communicate its status. The correct answer indicates that such a vessel should show two masthead lights (white lights) and sidelights (red on the port side and green on the starboard side).

The two masthead lights are positioned vertically, with one being higher than the other, and they serve to indicate the presence of the vessel to others on the water. The sidelights provide information about the direction that the vessel is facing – the red light on the port side and the green light on the starboard side help other vessels determine if the power-driven vessel is coming towards them or moving away.

This combination of lights is crucial for safe navigation, especially during low visibility conditions or at night. It allows other mariners to assess the type, size, and orientation of the vessel, thereby reducing the chances of collisions.

In contrast, the other options do not meet the requirements for a power-driven vessel underway. For example, showing only a 360-degree white light does not provide essential directional information and is typically used for vessels at anchor. Displaying only the red and green lights lacks the necessary masthead lights essential for a