What does a yellow over white light indicate?

A yellow over white light indicates a vessel towing another vessel. This configuration is crucial for safe navigation, as it helps other vessels recognize the towing situation and navigate accordingly. The yellow light signals that the vessel is engaged in a towing operation, which can affect its maneuverability and the presence of a tow that may not be immediately visible.

Understanding these light signals is essential for avoiding collisions on the water and following proper maritime navigation rules. Mariners rely on visual signals to determine the status of nearby vessels to ensure safe passage, especially in busy waterways. In this case, the yellow over white light serves as a clear indicator for other vessels to be cautious and to take appropriate action when encountering a towing situation.