What is UASFM (UAS Facility Map)?
The UAS Facility Map (UASFM) is the FAA's grid-cell map showing the maximum altitude at which automatic LAANC authorization is available in controlled airspace around airports.
UASFM divides controlled airspace around participating airports (currently ~700+ in the US) into roughly 1-square-mile grid cells. Each cell has a published ceiling — 0, 100, 200, 300, or 400 ft AGL — representing the highest altitude at which LAANC will grant automatic approval.
The ceilings are set by the FAA based on the airport's traffic patterns, instrument approach paths, and obstacle environment. Cells directly under final approaches typically have 0 ft ceilings. Cells well clear of approach paths and away from the airfield typically have 200–400 ft ceilings.
The full UASFM is publicly viewable at faa.gov/uas/commercial_operators/uas_facility_maps. LAANC providers (Aloft, AirMap, AutoPylot) integrate it directly. Altoa surfaces the per-cell ceiling in our airspace check.
What this means for pilots
Always check the UASFM cell for your exact takeoff location. Two cells next to each other can have very different ceilings — a 0 ft cell and a 200 ft cell can be a quarter mile apart. Choose the higher-ceiling cell when possible to maximize operational altitude.
FAQ
Can the UASFM ceiling change?
Yes. The FAA updates UASFM periodically. Always check the current ceiling before flight.
What if my flight crosses two cells with different ceilings?
You're authorized to the lower ceiling along the entire path. Plan to stay in the higher-ceiling cell or apply for a waiver.
Does UASFM apply outside controlled airspace?
No. In Class G and most Class E above the surface, UASFM doesn't apply because LAANC isn't required.
Related terms
FAA regulations change. Verify current rules at faa.gov/uas before relying on this article for flight planning. Altoa is not the FAA.