What type of lighting is required at the stern of a boat?

The correct answer identifies the requirement for an all-round mast light at the stern of a boat, which is essential for safe navigation, especially during nighttime or low-visibility conditions. An all-round mast light provides visibility from all directions and serves to alert other vessels to the presence of your boat, reducing the risk of collisions.

This type of lighting is particularly important at the stern because it indicates that the boat is underway and provides a clear indication of its orientation and status to other vessels approaching from behind. A properly lit vessel ensures compliance with maritime regulations and enhances safety on the water.

Red and green lights are typically used for the bow of the vessel to indicate port (left) and starboard (right) sides, while blue lights are sometimes used for specific situations, such as law enforcement or certain operational vessels. However, they do not meet the requirement for stern illumination. Not having any lights at the stern would compromise the safety of the vessel, making it difficult for others to see and navigate around it.