FullDescription:Flight operations

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Altimetry system error

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Term altimetry system error
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Abbreviation

ASE

Definition

"The difference between the altitude indicated by the altimeter display assuming a correct altimeter barometric setting, and the pressure altitude corresponding to the undisturbed ambient pressure."

Definition Source

ICAO (2007) Official definition, Annex6/I

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Level off

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Term (to) level off
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SESAR

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Abbreviation

Definition

To maneuver an aircraft into a flight attitude that is parallel to the surface of the earth after gaining or losing altitude.

Definition Source

The free dictionary [1]

This definition is also supported by the SESAR working package 16 Definitions Team.

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Lexicon Release

Lexicon Release 2015.2

Missed Approach

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Term Missed Approach
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Missed Approach Segment

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Abbreviation

M/A

Definition

A manoeuvre conducted by a pilot when an instrument approach cannot be completed to a landing. The route of flight and altitude are shown on instrument approach procedure charts.

Definition Source

CANADA, (2008), Civil Aviation Terminology System (CATS), Transport Canada, URL: http://www.tc.gc.ca/aviation/applications/cats/en/showresults.asp?ID_no=108858&display_order=1&user_id=31847&search_criteria=approche+interrompue&lang_cd=2&rec_count=17&search_type=1

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Missed approach holding fix

Link Semantic Value
Term missed approach holding fix
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Missed Approach

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Abbreviation

Definition

A fix used in RNAV applications that marks the end of the missed approach segment and the centre point for the missed approach holding.

Definition Source

ICAO (2006), Official definition, PANS-OPS/I Procedures for Air Navigation Services — Aircraft Operations — Flight Procedures [Doc 8168/I]

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Missed approach index

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Term missed approach index
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Missed Approach

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Definition

The sequential position, within the approach azimuth data base or back azimuth data base, of the waypoint definition data for the first encoded (last flown) waypoint of the associated missed approach procedure.

Definition Source

ICAO, Official definition, AN 10/I Aeronautical Telecommunications — Radio Navigation Aids 1996, 5th ed., Amdt 71, p. 85, Table A-13 (aa)

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Missed approach point

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Term missed approach point
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Missed Approach

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Abbreviation

MAPT

Definition

That point in an instrument approach procedure at or before which the prescribed missed approach procedure must be initiated in order to ensure that the minimum obstacle clearance is not infringed.

Definition Source

ICAO, Official definition, PANS-OPS/I Procedures for Air Navigation Services — Aircraft Operations — Flight Procedures [Doc 8168/I]

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Missed approach turning fix

Link Semantic Value
Term missed approach turning fix
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Missed Approach

Missed approach point

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Abbreviation

MATF

Definition

A fix different from MAPt [missed approach point] that marks a turn in the missed approach segment.

Definition Source

ICAO, Official definition, Abbreviation and term added to PANS-ABC (Doc 8400) by Amdt 28 (2007)

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Reversal procedure

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Term reversal procedure
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Abbreviation

Definition

A procedure designed to enable aircraft to reverse direction during the Initial Approach Segment of an Instrument Approach Procedure. The sequence may include procedure turns or base turns.

Definition Source

ICAO (2009) Annex 4, Aeronautical Charts (11th edition), Official term and definition

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Waypoint

Link Semantic Value
Term waypoint
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spelling variant: way-point

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Abbreviation

WPT

Definition

A specified geographical location used to define an area navigation route or the flight path of an aircraft employing area navigation. Waypoints are identified as either: Fly-by waypoint [...] or Flyover waypoint [...]

Definition Source

ICAO (2006), doc. 8168 (Aircraft Operations), Vol. I (Flight Procedures)

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