indicator system

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

fire extinguishing system indicator disc

abbreviated visual approach slope indicator system (avasis)

visual approach slope indicator system (vasis)

back-up hydraulic system failure indicator

fire extinguishing system sprinkler system and fire alarm system

air-flow indicator

artificial horizon (gyro horizon/ attitude indicator)

desiccant indicator

gyro course indicator

indicator console

indicator lamp

indicator light

performance indicator

radiac computer-indicator

range height indicator (RHI) scope

target indicator

telltale indicator

turbine inlet temperature indicator

vertical gyro indicator

vertical scale indicator

counter indicator

gyroscope course indicator scale

zone-beat indicator

slave indicator

indicator sight glass window

indicator elevating mechanism

standard performance indicator dictionary

bearing preload indicator

capacity indicator

distant indicator

electric indicator lamp