California department of transportation (Caltrans), Division of Aeronautics provided airport layout drawings with estimated digitized airport property or fence lines with Google Pro images background. Caltrans Division of Research, Innovation and System Information (DRISI) GIS office digitized the airport boundary lines with Bing Maps Aerial background and built the boundary lines into a GIS polygon feature class. Generally, Airport Layout Plans do not show complete connected property or fence lines. In many cases the boundary lines were interpreted among the property and fence lines with our best judgement. The airport general information derived from FAA Aiport Master Record and Reports with their URL are included in the attribute table. Airport boundary data is intended for general reference and does not represent official airport property boundary determinations.

The FAL contains the list of federalized and defederalized airports as approved by Aviation Operations.

Fentress AICUZ/APZ. More information can be obtained at Naval Air Station Oceana's website.

Military Special Use Airspace is airspace of defined dimensions identified by an area on the surface of the earth wherein activities must be confined because of their nature, and/or wherein limitations may be imposed upon aircraft operations that are not a part of those activities (FAA Order 7610.4K CHG 1, Section 1.3). Limitations may be imposed upon aircraft operations that are not a part of the airspace activities. Special use airspace includes any associated underlying surface and subsurface training areas. The types of SUA are Special Use Airspace (SUA), Alert Area, Controlled Firing Area, Military Operating Area (MOA), Special Operation Area (SOA), Prohibited Area, Restricted Area, Warning Area and Altitude Reservations (ALTRV). DoD Special Use Airspace (SUA) from the NGA Digital Aeronautical Flight Information File (DAFIF). The MarineCadastre.gov team worked with the Navy to provide this data, which is a subset of the Navy's Common Operating Picture for ocean planning purposes.