No vehicles may be driven within 10 feet of a parked aircraft, except under which condition?

Vehicles are generally prohibited from being driven within 10 feet of a parked aircraft to ensure safety and prevent potential damage to the aircraft. However, there are specific scenarios where this restriction can be relaxed to facilitate necessary operations. All the options provided—servicing, loading, and off-loading—fall under essential activities that require proximity to the aircraft.

When aircraft are being serviced, mechanics or ground crew may need to use specialized vehicles and equipment that must be close to the aircraft to perform maintenance tasks effectively. Similarly, loading and off-loading also require vehicles to be near the aircraft to transport cargo and personnel efficiently. Given that these activities are crucial for the operation of the aircraft and may necessitate closer vehicle access, it is essential for the airfield personnel to follow safety protocols while performing these tasks. Thus, the correct answer encompasses all these scenarios, as they represent the necessary exceptions to the general rule about vehicle distance from aircraft.