U-2 aircraft

Definition/Scope: The U-2 provides continuous day or night, high-altitude, all weather, stand-off surveillance of an area and provides critical intelligence to decision makers through all phases of conflict. The U-2 can carry a variety of sensors and cameras as well as communications relays.

Used For:

surveillance aircraft by name

Broader Terms:

Air Force aircraft
reconnaissance aircraft

Narrower Terms:

HF
UHF
very high frequency
very high frequency (secure)
VHF
VHF (secure)