Aeronautical Terms beginning with I
IAF
Initial Approach Fix.
IAP
Instrument Approach Procedures.
IAS
Indicated Airspeed.
ICAO
International Civil Aviation Organization.
IFR
Instrument Flight Rules.
ILS
Instrument Landing System.
IMC
Instrument Meteorological Conditions.
INS
Inertial Navigation System.
IVSI
Instantaneous Vertical Speed Indicator.
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