Civil aviation dictionary
Aviation glossary
Terms, abbreviations and procedures explained without unnecessary jargon, with English names and clear definitions.
- Total entries
- 2480
- Terms
- 435
- Abbreviations
- 2045
I
- Abbreviationif visibility remains
IFVR stands for if visibility remains in FAA terminology.
- OperationsIF/IAWP
Intermediate Fix/Initial Approach Waypoint. The waypoint where the final approach course of a T approach meets the crossbar of the T.
- AbbreviationIFR military training route
IR stands for IFR military training route in FAA terminology.
- Flying skillsIFR TAKEOFF MINIMUMS AND DEPARTURE PROCEDURES
Title 14 Code of Federal Regulations, part 91, prescribes standard takeoff rules for certain civil users.
- OperationsILS CATEGORIES
1. Category I. An ILS approach procedure which provides for approach to a height above touchdown of not less than 200 feet and with runway visual range of not less than 1,800 feet.- 2.
- Abbreviationimmediate or immediately
IMT stands for immediate or immediately in FAA terminology.
- Abbreviationin and out of clouds
IAO stands for in and out of clouds in FAA terminology.
- Abbreviationin clouds
INC stands for in clouds in FAA terminology.
- Abbreviationin progress
INPR stands for in progress in FAA terminology.
- Abbreviationin RVR indicates visibility greater than highest reportable sensor value (e.g. P600FT)
P stands for in RVR indicates visibility greater than highest reportable sensor value (e.g. P600FT) in FAA terminology.
- Abbreviationin RVR indicates visibility less than lowest reportable sensor value (e.g. M600)
M stands for in RVR indicates visibility less than lowest reportable sensor value (e.g. M600) in FAA terminology.
- Abbreviationin temperature field means “minus” or below zero
M stands for in temperature field means “minus” or below zero in FAA terminology.
- Abbreviationin the vicinity of
INVOF stands for in the vicinity of in FAA terminology.
- AbbreviationIn-Flight Emergency Assistance
IFEA stands for In-Flight Emergency Assistance in FAA terminology.
- Flying skillsIndicated airspeed
The airspeed shown by the aircraft's airspeed indicator before the relevant corrections are applied.
- Abbreviationindividual flight plans from this point
IFPFP stands for individual flight plans from this point in FAA terminology.
- AerodynamicsInduced drag
Drag arising from the production of lift by a finite-span wing.
- Abbreviationinitial approach
INA stands for initial approach in FAA terminology.
- Abbreviationinitial point/H-hour control line
IP/HHCL stands for initial point/H-hour control line in FAA terminology.
- OperationsINNER MARKER
A marker beacon used with an ILS (CAT II) precision approach located between the middle marker and the end of the ILS runway, transmitting a radiation pattern keyed at six dots per second and indicating to the pilot, both aurally and visually, that he/she is at the designated decision height (DH), normally 100 feet above the touchdown zone elevation, on the ILS CAT II approach.
- Abbreviationinstructor pilot
IP stands for instructor pilot in FAA terminology.
- Abbreviationinstrument
INST stands for instrument in FAA terminology.
- Abbreviationinstrument approach chart (followed by name/title)
IAC stands for instrument approach chart (followed by name/title) in FAA terminology.
- Flying skillsINSTRUMENT APPROACH OPERATIONS
An approach and landing using instruments for navigation guidance based on an instrument approach procedure.