operational flight information service

aerodrome flight information service

compartmented information (sensitive compartmented information [SCI])

operational flight/ flying

operational flight envelope

combat operational stress control service

operational ceiling (service ceiling)

enter operational service

operational service

flight information centre

flight information region (FIR)

project flight information

information and technical support service

antiaircraft information service

Artillery Information Service

preflight information service

automatic terminal information service (ATIS)

aeronautical information service (AIS)

airline telecommunication and information service

flight restriction zone / flight restricted zone (FRZ)

side cap; garrison / flight cap (US); wedge cap (Canada); field service cap (UK)

flight-line service

flight envelope / performance envelope / service envelope

service flight envelope

branch (military/service branch, armed service)

separate from active service / the service

Y service (Y-service) / Y-station

regional meteorological service/ regional weather service (RWS)

emergency service / emergency operations service

combat operational stress control (COSC)

common operational picture (COP)

contemporary operational environment / contemporary operating environment (COE)

contiguous operational area