The indicator “Booking and Release Procedures” monitors the actual use of SUAs compared to the number of hours that they were notified as being restricted or segregated from general air traffic.
It is compiled using the number of hours that shared use airspace (SUA) has been reserved for restriction or segregation from general air traffic; the number of hours that it was subsequently used for such activity.
Additionally, the number of hours that previously reserved airspace were returned for use by general air traffic, with a notification period of three hours or more, is monitored.