FullDescription:Flight operations
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
| Link | Semantic Value |
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| Term | (to) level off |
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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
| Link | Semantic Value |
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| Term | Missed Approach |
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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 |
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| Term | missed approach holding fix |
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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
| Link | Semantic Value |
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| Term | missed approach index |
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Abbreviation
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
| Link | Semantic Value |
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| Term | missed approach point |
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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 |
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| Term | missed approach turning fix |
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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
| Link | Semantic Value |
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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 |
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| 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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