Which vessel type is represented at night with the light signal of green over white?

The correct answer is associated with vessels that are engaged in trawling. The signal of green over white lights is a specific identification used in navigation to indicate the activity of a fishing vessel that is trawling.

When a vessel is trawling, it involves dragging a fishing net through the water, often in a manner that necessitates additional precautions due to the gear involved. The green light indicates that the vessel is engaged in fishing, while the white light signifies the activity of trawling, distinguishing it from other types of fishing operations.

In contrast, the other vessel types do not use this specific lighting configuration at night. For example, vessels engaged in general fishing may display different light signals, and while sailing vessels under machinery also have their own distinct signaling requirements, they do not utilize the green over white configuration. Similarly, support vessels are categorized differently and would not fall under the trawling definition. Thus, understanding these light signals is crucial for safe navigation and recognition of different vessel activities at night.