fire-control instrument (FCI)

instrument takeoff / instrument take-off

auxiliary fire control instrument

fire-control instrument

individual control (of fire) / individual fire control

fire-control director / fire control director

fire control orders (FCO) ('Hold Fire', 'Cease Fire' and 'Engage')

slant fire; diagonal fire; oblique fire; fire to the oblique

automated integrated survey instrument (AISI)

board instrument

radiac (instrument)

sighting instrument

survey instrument

instrument criticality

instrument air intake line

altazimuth instrument

angular instrument

counting instrument

driver's instrument panel

visual plotting instrument

instrument bench truck

instrument cluster

instrument light

instrument panel light

instrument panel support

instrument repair truck

instrument repairer

inferred-zero instrument

instrument oil

non-instrument runway

instrument approach

instrument approach chart

instrument calibration