What is the maximum allowable altitude for a small unmanned aircraft during a flight?

The maximum allowable altitude for a small unmanned aircraft during flight is 400 feet above ground level (AGL). This altitude limit is established by the Federal Aviation Administration (FAA) to ensure the safety and integration of unmanned aircraft systems (UAS) within the national airspace.

Flying at or below 400 feet helps to minimize the risk of encounters with manned aircraft, which typically operate at higher altitudes. Additionally, this altitude regulation helps to ensure that smaller UAS can operate safely in more congested areas, such as near buildings or other obstacles, reducing the risk of accidents and enhancing operational safety.

While there may be exceptions under specific circumstances (such as when flying within a 400-foot radius of a building or in controlled airspace, granted you have permission), the standard limit for most small unmanned aircraft is indeed set at 400 feet AGL. This regulation is crucial for maintaining safety throughout aviation operations and facilitating the effective use of airspace.