In which situation would a vessel typically display yellow over white lights?

A vessel typically displays yellow over white lights when it is engaged in towing another vessel. This specific configuration of lights serves as a visual indication to other mariners regarding the vessel's operation. The yellow over white lights signal that the vessel may have limitations in maneuverability and highlights its towing status, thereby providing essential information for collision avoidance and navigation.

In maritime practice, these lights are part of the International Regulations for Preventing Collisions at Sea (COLREGs), which outlines the visual signals required for different types of vessels and activities. Properly displaying these lights is crucial for ensuring safety on the water, as it helps other vessels recognize the towing vessel's intentions and adjust their navigation accordingly.

Each of the other situations listed—fishing, trawling, and being at anchor—has its own specific light configurations, which are different from the yellow over white signal used for towing. Understanding these distinctions is vital for operators to comply with navigation rules and promote safety in maritime operations.