When flying to an airport, the aircraft operator will typically have to pay Landing & Circuit Fees. Landing fees are used to help maintain airport facilities such as runway and taxiway upkeep and to help pay for ATSU (Air Traffic Service Unit) staffing costs. To attract new visitors, some airports choose not to charge a fee. Some airports in the US don’t charge a fee, as they’re subsidised by the FAA (Federal Aviation Administration). The fee paid depends on the aircraft type, weight, time of day (for example Out of Hours operations are more expensive), number of passengers and aircraft handling requirements. Other related fees include touch-and-go fees, circuit fees, go-around fees and other Aircraft Traffic Control-related fees. Landing Fees can be found on the AvPay Airport Directory. Landing fees can be charged based on aircraft weight, or aircraft type such as gyrocopters, paragliders, ultralight aircraft, piston helicopters, turbine helicopters, turboprop aircraft, jet aircraft, single engine piston aircraft, light sport aircraft, microlights, experimental aircraft, multi engine piston aircraft, military jet aircraft and military piston aircraft.