Definition
An airspace reservation that covers a fixed, defined area on the surface for a specified period of time, within which certain non-routine aviation activities take place and through which other aircraft are generally not permitted to fly without coordination.
Plain English
A block of airspace over a fixed location that is set aside for a specific activity for a set period. While it is active, other aircraft normally have to stay out unless they get permission.
Context Anchor
You may see this term in air traffic control planning, notices, or coordination for special operations that need protected airspace.
Derivation
Stationary comes from the Latin stationarius, meaning standing still or fixed in place. In this context it tells you the reserved airspace does not move, in contrast to a moving airspace reservation that travels with an aircraft or formation along a route.
Why Pilots Care
Pilots must avoid these areas when active to prevent conflicts with high-energy or hazardous operations, often backed by temporary flight restrictions.
Intuition Check
Stationary does not mean the aircraft inside it are not moving. It means the reserved airspace itself stays in a fixed place. Reservation does not mean private ownership of the sky. It means the airspace is temporarily set aside for a specific use.
Example Sentence 1
While reviewing NOTAMs, the pilot identified a stationary airspace reservation over the test range and adjusted the route to remain clear of it.
Example Sentence 2
During the rocket test window a stationary airspace reservation extended from the surface to FL400.