I

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


IAF: Initial Approach Fix, the fixes on an instrument approach chart that identify the beginning of the initial approach segment(s)

IAP: Instrument Approach Plates, a book of charts defining instrument landing approaches

IAP: Instrument Approch Procedure, a series of predefined maneuvers that transfer a plane on an instrument flight to the point where a landing can be made visually

IAS: Indicated airspeed -- airspeed as measured by pitot tube ram air pressure. Diverges from true airspeed (TAS) as altitude increases.

ICAO: The International Civil Aviation Organization, a multinational treaty organization that sets aviation standards of various sorts including the naming of airports, navaids and intersections.

ICING: A catch-all term that variously refers to carburetor icing, pitot tube icing and airframe icing.

IDENT: A request from ATC for a pilot to activate this function on his transponder

IF: Intermediate Fix, the fix that starts the intermediate approach segment of an instrument approach procedure

IFR: Instrument Flight Rules, the set of rules governing flight solely through the use of instruments; often used to mean weather conditions that require instrument flight

IGNITER: A turbine engine component used to "light off" the fuel/air mixture during engine start. Effectively a large glow plug.

ILS: Instrument Landing System, a two part radio navigation system consisting of a localizer for left/right guidance and a glide slope for vertical guidance

IM: Inner Marker, a radio beacon used during an ILS landing approach located near the end of the runway

IMC: Instrument Meteorological Conditions, weather conditions that are such that instrument (IFR) flight is required

IAS: Indicated airspeed.

INDUCED DRAG: The retarding force experience by an aircraft when its lift vector is tilted back from vertical. Combines with "form drag" to yield total aircraft drag.

INI FILE: Initialization file, often referred to simply as a ".ini". Usually contains startup parameter values but might instead launch an installation process.

INITIAL APPROACH SEGMENT: On an instrument approach, the segment between the IAF (initial approach fix) and the intermediate fix

INTERMEDIATE APPROACH SEGMENT: On an instrument approach, the segment between the intermediate fix and the final approach fix

INTERSECTION: A defined geographic point (defined via navaids) used as a reference point during instrument flight

INTERSECTION: At an airport, the point where two runways, a runway and taxiway or two taxiways cross

IP: Initial Point, the point at which a bomber's run-in to the bomb release point is to begin.

IRON BOMB: A bomb with no attached or built-in guidance package.

IRON MIKE: An autopilot.


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z