instrument approach procedure (IAP)

instrument takeoff / instrument take-off

instrument approach

instrument approach chart

ground-controlled approach procedure

missed approach procedure (aviation)

approach reference procedure

missed approach procedure

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

fire-control instrument (FCI)

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 calibration

instrument certificate