identified in a published WRA Notice to Airmen (NOTAM). 

b. WRAs.  Airspace with defined dimensions and published by a NOTAM, which is established to support weather reconnaissance/research flights. ATC services are not provided within WRAs. Only participating weather reconnaissance/research aircraft from the 53$^{rd}$ WRS and NOAA AOC are permitted to operate within a WRA. A WRA may only be established in airspace within U. S. Flight Information Regions (FIR) outside of U. S. territorial airspace. 

c. A published WRA NOTAM describes the airspace dimensions of the WRA and the expected activities within the WRA. WRAs may border adjacent foreign FIRs, but are wholly contained within U.S. FIRs. As ATC services are not provided within a WRA, non − participating aircraft should avoid WRAs, and IFR aircraft should expect to be rerouted to avoid WRAs. 

## 3 − 5 − 9. Other Non − Charted Airspace Areas 

a. Stationary or Moving Altitude Reservation (ALTRV). A Stationary or Moving ALTRV is announced via an airspace NOTAM issued by the Central Altitude Reservation Facility (CARF) or ARTCC. These announcements will appear in CARF and/or ARTCC NOTAMS. This airspace ensures non − participating IFR aircraft remain separated from special activity. Non − participating VFR aircraft are permitted to fly through the area but should exercise vigilance. 

b. ATC ASSIGNED AIRSPACE. Airspace of defined vertical/lateral limits, assigned by ATC, for the purpose of providing air traffic segregation between the specified activities being conducted within the assigned airspace and other IFR air traffic. ATCAA locations and scheduled activation informa- tion can be found on the FAA SUA website; a NOTAM will not be issued to announce the activation of this airspace. 

