Which of these is a requirement for proper navigation lighting on vessels?

The requirement for proper navigation lighting on vessels is crucial for safety and visibility while on the water. The correct configuration consists of a red light on the left side (port side), a green light on the right side (starboard side), and an all-around white light, which is typically used at anchor or for visibility in any direction. This color coding helps other vessels determine the direction in which a boat is facing and its movement.

The red and green lights allow for quick identification of a vessel's orientation. When approaching another boat, seeing the red light means you are looking at the port side of that vessel, while the green light signifies the starboard side. The all-around white light indicates that the vessel is either at anchor or in a position where it’s important for other boats to maintain awareness of its presence.

This system of navigation lighting is mandated by maritime regulations to enhance safety on the water and ensure that all mariners understand the positions and movements of nearby vessels. Properly adhering to these lighting requirements is essential for reducing the risk of collisions and ensuring safe navigation during both day and night.