What is the purpose of an aft towing light on a vessel?

The purpose of an aft towing light on a vessel is to show the presence of the vessel at night. This type of light is typically mounted on the stern and serves as a navigational aid to alert other vessels to the presence and location of the towing vessel and its tow during nighttime operations. By providing visibility in darkness, it helps to prevent collisions and ensures that other mariners are aware of the towing situation, which is crucial for maintaining safety on the water.

In the context of nighttime navigation, having a clearly visible aft towing light is vital, as it allows nearby vessels to understand the configuration and movement of the tow, thereby facilitating safe navigation in proximity to the towing vessel.