What type of vessel uses a yellow light?

A yellow light is used specifically by towing commercial vessels to indicate their operational status and to ensure that other boaters can recognize that these vessels are engaged in towing activities. This is critical for safety, as towing vessels have unique handling characteristics and may be restricted in their ability to maneuver. The yellow light serves as a warning to other mariners that they should exercise caution when navigating near these vessels.

In contrast, pleasure crafts, sailing vessels, and fishing trawlers typically use different navigational lights to signify their type and status. For example, pleasure crafts often use white lights, while sailing vessels have specific light arrangements for their sails and navigation. By using a yellow light, towing vessels help to prevent accidents and promote safe navigation on the water.