air

aircraft

airport

airspace

antenna

army

aviation

background

blue

broadcast

city

communication

conditions

connection

contact

control

counterair

defence

detect

detection

digital

dish

equipment

flight

flying

industrial

locator

military

mobile

observation

outdoor

plane

protection

radar

radio

safety

satellite

security

signal

sky

space

station

surveillance

system

technology

tower

transportation

travel

turns

war

weapon