What is the maximum altitude a sUAS can fly in controlled airspace without authorization?

The maximum altitude that a small Unmanned Aircraft System (sUAS) can fly in controlled airspace without requiring prior authorization is 400 feet Above Ground Level (AGL). This regulation is in place to ensure that sUAS operations do not interfere with manned aircraft, especially those operating at lower altitudes, which is a common area of operation for general aviation.

Flying at or below this altitude allows sUAS operators to maintain safe distances from potential conflicts with other aircraft, particularly those that are also operating within the structured airspace. It's essential for operators to be aware of these regulations to operate their drones safely and legally.

Higher altitudes, such as 500 feet AGL or above, typically require specific authorization from air traffic control due to the increased risk of conflict with manned aircraft that may be operating at those altitudes. Additionally, the lower altitude options, like 200 feet or 300 feet AGL, do not reflect the current regulatory standard, which clearly establishes 400 feet as the maximum permissible altitude.