Typically, any aircraft that is maneuvering, or perceived to be maneuvering, in an unnatural or not an ordinary manner is believed to be unsafe. This raises concerns from persons on the ground. In reality, most aircraft operation is quite safe and legal. Airplanes are required to maintain 500 feet of distance - either above or horizontally from any persons or structures in sparsely population areas. In densely populated areas, the required distance is 1,000 feet. Helicopters are allowed to operate with less clearance.
Exceeding Noise limits
It is rare that the noise generated from one aircraft overflight would exceed the legal noise limits for an area; however, accumulated overflight noise may become an annoyance. In these cases, the Airport may be notified and an attempt will be made to identify the aircraft.