1.A defined volume of airspace temporarily reserved for exclusive or specific use by categories of users (TSA, TRA, CBA) and Airspace Restriction designates Danger, Restricted and Prohibited Areas.
2.A defined volume of airspace temporarily reserved for exclusive or specific use by categories of users. These airspace reservations may be stationary, like an “ad-hoc” TSA, or moving along with the flight path to facilitate aerial operations like en-route Air to Air Refuelling.
1.SESAR Concept of Operations Step 2 Edition 2014 (Ed. 01.01.00)
2.SESAR Guidance on KPIs and Data Collection Version 1 (D85, Ed. 00.01.01, 2014)
Lexicon Release 2015.1