When approaching an aircraft at night, what should vehicle operators do with their headlights?

When approaching an aircraft at night, vehicle operators should turn off their headlights and leave the parking lights on to avoid distracting the pilots or blinding them. The bright lights from a vehicle can impair the pilots' night vision as they prepare for takeoff or landing. By using parking lights instead, vehicle operators maintain a visible presence without jeopardizing the safety of the aircraft operations. This approach helps ensure that pilots can see the runway, taxiways, and other important visual cues without being hindered by excessive lighting from ground vehicles, promoting safety in airfield environments.