FullDescription:Rules of the Air

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Advisory airspace

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Term advisory airspace
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Abbreviation

Definition

An airspace of defined dimensions, or designated route, within which air traffic advisory service is available.

Definition Source

ICAO (2005) Official definition, ANNEX 2 Rules of the Air 2005

Note

Aerodrome Traffic Zone

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Term Aerodrome Traffic Zone
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Aerodrome Flight Information Service

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Narrower term


Abbreviation

ATZ

Definition

An airspace of defined dimensions established around an aerodrome for the protection of aerodrome traffic.

Definition Source

ICAO (2005), Official definition, ANNEX 2 Rules of the Air 2005

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Aeronautical station

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Term aeronautical station
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aeronautical telecommunication station

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Abbreviation

Definition

A land station in the aeronautical mobile service. In certain instances, an aeronautical station may be located, for example, on board ship or on a platform at sea.

Definition Source

ICAO (2005) Official definition,

ANNEX 2 Rules of the Air 2005,

ANNEX 10/II Aeronautical Telecommunications — Communication Procedures including those with PANS status 2001, 6th ed. (Amdt 78, 14/07/2003)

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Air traffic

Link Semantic Value
Term air traffic
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Abbreviation

Definition

All aircraft in flight or operating on the manoeuvring area of an aerodrome.

Definition Source

ICAO (2005) Official definition, ANNEX 2 Rules of the Air 2005

Note

Air traffic advisory service

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Term air traffic advisory service
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advisory airspace

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Abbreviation

Definition

A service provided within advisory airspace to ensure separation, in so far as practical, between aircraft which are operating on IFR flight plans.

Definition Source

ICAO, Official definition, ANNEX 2 Rules of the Air 2005, 10th ed.

Note

Air traffic control clearance

Link Semantic Value
Term air traffic control clearance
Status


Mandatory for

ICAO; EU

Contexts

SESAR

Categories


Synonyms

ATC clearance

clearance

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Broader term


Narrower term


Abbreviation

Definition

Authorization for an aircraft to proceed under conditions specified by an air traffic control unit.

Definition Source

ICAO, Official definition, AN 2 Rules of the Air, 2005

Note

Air traffic control service

Link Semantic Value
Term air traffic control service
Status


Mandatory for

EUROCONTROL SESAR

Contexts

SESAR

EAEA

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air traffic controller

Broader term


Narrower term


Abbreviation

Definition

A service provided for the purpose of:

a) preventing collisions:

1. between aircraft, and

2. on the manoeuvring area between aircraft and obstructions; and

b) expediting and maintaining an orderly flow of air traffic.

Definition Source

ICAO, Official definition, AN 2 Rules of the Air 2005

Note

Air traffic control unit

Link Semantic Value
Term air traffic control unit
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ATC unit

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Broader term

air traffic control

Narrower term


Abbreviation

Definition

A generic term meaning variously, area control centre, approach control unit or aerodrome control tower.

Definition Source

ICAO, Official definition, modified by: Amdt 40 to An 11 (01/11/2001), Amdt 36 to An 2 (01/11/2001), and PANS-ATM, 14th ed. (01/11/2001)

Note

Air traffic services unit

Link Semantic Value
Term air traffic services unit
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ATS unit

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Abbreviation

ATSU

Definition

A generic term meaning variously, air traffic control unit, flight information centre or air traffic services reporting office.

Definition Source

ICAO (2007) Official definition

ANNEX 3 Meteorological Service for International Air Navigation 2010

ANNEX 11 Air Traffic Services 2001

Note

Airspace Reservation

Link Semantic Value
Term Airspace Reservation
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SESAR

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airspace restriction

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Narrower term


Abbreviation

ARES

Definition

1. "A defined volume of airspace temporarily reserved for exclusive or specific use by categories of users."

These airspace reservations may be stationary, like an “ad-hoc” TSA, or moving along with the flight path to facilitate aerial operations like en-route Air to Air Refuelling.

2. A defined volume of airspace normally under the jurisdiction of one aviation authority and temporarily reserved, by common agreement, for exclusive use by another aviation authority.

Definition Source

1. Commission Regulation (EC) No 2150/2005 of 23 December 2005 laying down common rules for the flexible use of airspace


2. ICAO DOC 9426 Air Traffic Services Planning Manual 1984, p. V-1-1-2

Note

In the context of SESAR, this term is often referred to as "airspace reservation/restriction" (ARES).

Airspace restriction

Link Semantic Value
Term airspace restriction
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SESAR

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Airspace Reservation

Broader term


Narrower term

danger area

restricted area

prohibited area

Abbreviation

Definition

a defined volume of airspace within which, variously, activities dangerous to the flight of aircraft may be conducted at specified times (a ‘danger area’); or such airspace situated above the land areas or territorial waters of a State, within which the flight of aircraft is restricted in accordance with certain specified conditions (a ‘ restricted area ’); or airspace situated above the land areas or territorial waters of a State, within which the flight of aircraft is prohibited (a ‘ prohibited area ’).

Definition Source

EUROCONTROL (2010) Draft EUROCONTROL Specification for harmonized Rules for Operational Air Traffic (OAT) under Instrument Flight Rules (IFR) inside controlled Airspace of the ECAC Area (EUROAT), Ed. 1.2

COMMISSION REGULATION (EC) No 2150/2005, of 23 December 2005 laying down common rules for the flexible use of airspace

Note

In the context of SESAR, this term is often referred to as "airspace reservation/restriction" (ARES).

Airspace structure

Link Semantic Value
Term airspace structure
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Abbreviation

Definition

"A specific volume of airspace designed to ensure the safe and optimal operation of aircraft."

Definition Source

EUROPEAN UNION (2005) Commission Regulation (EC) No 2150/2005 of 23 December 2005 laying down common rules for the flexible use of airspace

Note

Airspace structure data

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Term airspace structure data
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airspace structure

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Abbreviation

Definition

"Set of data defining the airspace structure on which the functions comprising an automated ATS system are based."

Definition Source

EUROCONTROL (2004) EATM glossary

Note

Airway

Link Semantic Value
Term airway
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Broader term

Controlled Airspace

Narrower term


Abbreviation

AWY

Definition

"A control area or portion thereof in the form of a corridor."

Definition Source

ICAO (2007) "International Civil Aviation Vocabulary", Doc. 9713

Note

Alerting service

Link Semantic Value
Term alerting service
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flight information centre

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Abbreviation

ALRS

Definition

A service provided to notify appropriate organizations regarding aircraft in need of search and rescue aid, and assist such organizations as required.

Definition Source

ICAO, Official definition, AN 2 Rules of the Air 2005

Note

Along-track error

Link Semantic Value
Term along-track error
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Abbreviation

ATRK

Definition

A fix error along the flight track resulting from the total error contributions.

Definition Source

ICAO - GNSSP/2-WP/87 (Version 4.0) - p.1A-42

Note

Along-track tolerance

Link Semantic Value
Term along-track tolerance
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Abbreviation

ATT

Definition

A fix tolerance along the nominal track resulting from the airborne and ground equipment tolerances.

Definition Source

ICAO, Official definition,

PANS-OPS/II Procedures for Air Navigation Services — Aircraft Operations — Construction of Visual and Instrument Flight Procedures [Doc 8168/II] 2006

Note

Alternate aerodrome

Link Semantic Value
Term alternate aerodrome
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Abbreviation

ALTN

Definition

An aerodrome to which an aircraft may proceed when it becomes either impossible or inadvisable to proceed to or to land at the aerodrome of intended landing. Alternate aerodromes include the following:

a) Take-off alternate : an alternate aerodrome at which an aircraft can land should this become necessary shortly after take-off and it is not possible to use the aerodrome of departure;

b) En-route alternate : an aerodrome at which an aircraft would be able to land after experiencing an abnormal or emergency condition while en route;

c) ETOPS en-route alternate: a suitable and appropriate alternate aerodrome at which an aeroplane would be able to land after experiencing an engine shut-down or other abnormal emergency condition while en route in an ETOPS operation.

d) Destination alternate : an alternate aerodrome to which an aircraft may proceed should it become impossible or inadvisable to land at the aerodrome of intended landing.

Definition Source

ICAO (2007) Annex 2, Annex 3, Annex 6/I, Annex 11; Doc. 9713

Note

"The aerodrome from which a flight departs may also be an en-route or a destination alternate aerodrome for that flight." (source: ICAO doc. 9713)

Alternative trajectory

Link Semantic Value
Term alternative trajectory
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Broader term

trajectory

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Abbreviation

Definition

A trajectory which is calculated based on constraints which do not currently apply to the flight.

Definition Source

EUROCONTROL, EATM glossary 2004

Note

Approach control office

Link Semantic Value
Term approach control office
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approach control service

approach control

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Abbreviation

APP

Definition

A unit established to provide air traffic control service to controlled flights arriving at, or departing from, one or more aerodromes.

Definition Source

ICAO, Official definition, ANNEX 2 Rules of the Air, 2005

Note

Approach control unit

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Term approach control unit
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approach control office

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Abbreviation

Definition

A unit established to provide air traffic control service to controlled flights arriving at, or departing from, one or more aerodromes.

Definition Source

ICAO, Official definition

ANNEX 3 Meteorological Service for International Air Navigation 2010

ANNEX 2 Rules of the Air 2005

Note

Approach sequence

Link Semantic Value
Term approach sequence
Status


Mandatory for

ICAO

NATO

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Abbreviation

Definition

The order in which two or more aircraft are cleared to approach to land at the aerodrome.

Definition Source

ICAO (2004) Official definition, doc. PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)

Note

Appropriate ATS authority

Link Semantic Value
Term appropriate ATS authority
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appropriate Air Traffic Services authority

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Air Traffic Service

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Abbreviation

Definition

The relevant authority designated by the State responsible for providing air traffic services in the airspace concerned.

Definition Source

ICAO (2010) Official definition

AN 2 Rules of the Air 2005

AN 3 Meteorological Service for International Air Navigation 2010

AN 11 Air Traffic Services 2001

Note

Apron taxiway

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Term apron taxiway
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apron

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Abbreviation

Definition

A portion of a taxiway system located on an apron and intended to provide a through taxi route across the apron.

Definition Source

ICAO, Official definition

AN 2 Rules of the Air 2005

AN 4 Aeronautical Charts 2001, 10th ed. (Amdt 53, 12/07/2004)

AN 14/I Aerodromes — Aerodrome Design and Operations 2004, 4th ed. (Amdt 6, 12/07/2004)

Note

Area control centre

Link Semantic Value
Term area control centre
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Abbreviation

ACC

Definition

A unit established to provide air traffic control service to controlled flights in control areas under its jurisdiction.

Definition Source

ICAO (2010) Official definition, AN 2 Rules of the Air 2005, AN 3 Meteorological Service for International Air Navigation 2010, AN 11 Air Traffic Services 2001

Note

Area navigation

Link Semantic Value
Term area navigation
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performance-based navigation (PBN)

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Narrower term

Precision Area Navigation (P-RNAV)

Abbreviation

RNAV

Definition

A method of navigation which permits aircraft operations on any desired flight path within the coverage of ground- or spaced-based navigation aids or within the limits of the capability of self-contained aids, or a combination of these.

Definition Source

ICAO, Official term and definition added to AN 2 by Amdt 41 (20/07/2008), AN 3 by Amdt 75 (2010), AN 4 by Amdt 55 (2009), AN 6/I by Amdt 32 (20/07/2008), AN 6/III by Amdt 13 (20/07/2008), AN 10/I by Amdt 83 (20/07/2008), AN 15 by Amdt 35 (2009) and modified by Amdt 46 to AN 11 (20/07/2008)

Note

Area navigation includes performance-based navigation as well as other operations that do not meet the definition of performance-based navigation. (Note source: ICAO)

Basic area navigation

Link Semantic Value
Term basic area navigation
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performance-based navigation (PBN)

Broader term

area navigation (RNAV)

Narrower term


Abbreviation

B-RNAV

Definition

European RNAV operations which satisfy a required track, maintaining accuracy of ± 5 NM for at least 95% of the flight time. This level of navigation accuracy is comparable with that which can be achieved by conventional navigation techniques on ATC routes (defined by VOR/DME, when VORs are less than 100 NM apart).

Definition Source

EUROCONTROL, Skyway magazine No.46 - Autumn/Winter 2007

Note

Change-over point

Link Semantic Value
Term change-over point
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Mandatory for


Contexts

EAEA

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Abbreviation

COP

Definition

The point at which an aircraft navigating on an ATS route segment defined by reference to very high frequency omnidirectional radio ranges is expected to transfer its primary navigational reference from the facility behind the aircraft to the next facility ahead of the aircraft.

Definition Source

ICAO, Official definition, ANNEX 11, Rules of the Air

Note

Change-over points are established to provide the optimum balance in respect of signal strength and quality between facilities at all levels to be used and to ensure a common source of azimuth guidance for all aircraft operating along the same portion of a route segment.

Clearance function

Link Semantic Value
Term clearance function
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Air traffic control clearance

Broader term


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Abbreviation

Definition

The formulation and transmission of a clearance by an air traffic control unit as well as the acknowledgement and acceptance of such clearance by the pilot.

Definition Source

ICAO, Doc 9426, 1984, p. V-1-1-4

Note

Clearance limit

Link Semantic Value
Term clearance limit
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air traffic control clearance

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Abbreviation

Definition

The point to which an aircraft is granted an air traffic control clearance.

Definition Source

ICAO, Official definition

ANNEX 11 Air Traffic Services 2001

PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)

ANNEX 2 Rules of the Air 2005

Note

Co-operative Separation Assurance

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Term Co-operative Separation Assurance
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=

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Abbreviation

COSEP

Definition

advanced surveillance enabler - consisting of exchanges of state and intent data from aircraft to aircraft - to delegate separation assurance applications, such as in-trail or station keeping manoeuvres, crossing manoeuvres, airborne conflict avoidance, to aircrew under given conditions

Definition Source

ICAO (2002), "AERONAUTICAL MOBILE COMMUNICATIONS PANEL (AMCP), Working Group C - 5th meeting, 15 - 25 October 2002: AMCP/8 REPORT, chapters 8 and 9", Document AMCP WGC5/WP2. URL: http://www.icao.int/anb/panels/amcp/wg/C/wgc5/wgc5/wgc5_wp2.doc

Note

Controlled Airspace

Link Semantic Value
Term Controlled Airspace
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uncontrolled airspace

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Narrower term


Abbreviation

CAS

Definition

airspace type of defined dimensions within which air traffic control service is provided to IFR flights and to VFR flights in accordance with the airspace classification.

Definition Source

ICAO (2007), Official definition (Annex 2 and 11, PANS-ATM), "International Civil Aviation Vocabulary", Doc. 9713

Note

The controlled airspace includes control areas, airways and control zones and, depending on type of flight and air traffic service provided is classified as class A,B,C,D, and E.

Controlled VFR flight

Link Semantic Value
Term controlled VFR flight
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CVFR flight

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Visual Flight Rules

Broader term


Narrower term


Abbreviation

Definition

A flight conducted under VFR within Class B airspace and in accordance with an ATC clearance.

Definition Source

Transport Canada, Glossary for Pilots and Air Traffic Services Personnel, URL: http://www.tc.gc.ca/eng/civilaviation/secretariat-terminology-glossary-36.htm

Note

Controlled aerodrome

Link Semantic Value
Term controlled aerodrome
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uncontrolled aerodrome

Broader term


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Abbreviation

Definition

An aerodrome at which an air traffic control service is provided to aerodrome traffic.

Definition Source

ICAO/OACI, "International Civil Aviation Vocabulary", Doc. 9713, Vol.1, 1998, C325

Note

Controlled flight

Link Semantic Value
Term controlled flight
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Abbreviation

Definition

"Any flight which is subject to an air traffic control clearance."

Definition Source

ICAO (2007) "International Civil Aviation Vocabulary", Doc. 9713

Note

Cruising level

Link Semantic Value
Term cruising level
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EAEA

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Abbreviation

Definition

A level maintained during a significant portion of a flight.

Definition Source

ICAO, Official definition, Annex 6/I, Operation of Aircraft — International Commercial Air Transport — Aeroplanes (2010)

Note

Current flight plan

Link Semantic Value
Term current flight plan
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air-filed flight plan

flight plan

filed flight plan

operational flight plan

repetitive flight plan

Broader term


Narrower term


Abbreviation

Definition

The flight plan, including changes, if any, brought about by subsequent clearances.

Definition Source

ICAO, Official definition, PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)

Note

When the word 'message' is used as a suffix to this term, it denotes the content and format of the current flight plan data sent from one unit to another.

Danger area

Link Semantic Value
Term danger area
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prohibited area

restricted area

Broader term

airspace restriction

Narrower term


Abbreviation

Definition

An airspace of defined dimensions within which activities dangerous to the flight of aircraft may exist at specified times.

Definition Source

ICAO, Official definition,

ANNEX 2 Rules of the Air 2005

ANNEX 4 Aeronautical Charts 2001, 10th ed. (Amdt 53, 12/07/2004)

ANNEX 15 Aeronautical Information Services 2010

Note

Departure flight level

Link Semantic Value
Term departure flight level
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Broader term

flight level

Narrower term


Abbreviation

Definition

The flight level to which the flight is initially to climb issued as part of a departure clearance.

Definition Source

EUROCONTROL Standard Document For On-Line Data Interchange (OLDI), Edition Number : 3.00, Edition Date : 31/10/2003

Note

Diplomatic clearance

Link Semantic Value
Term diplomatic clearance
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diplomatic authorisation

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Abbreviation

Definition

Authority for overflight or landing obtained at government level.

Definition Source

JANE's Aerospace Dictionary, Third Edition, 1988

Note

Estimated Off-Block Time

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Term Estimated Off-Block Time
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Actual Off-Block Time

Scheduled Off-Block Time (SOBT)

Target Off-Block Time (TOBT)

Broader term


Narrower term


Abbreviation

EOBT

Definition

The estimated time at which the aircraft will commence movement associated with departure.

Definition Source

ICAO, Official definition, Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)

Note

Estimated time of departure

Link Semantic Value
Term estimated time of departure
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estimated departure time

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Abbreviation

ETD

Definition

The estimated time at which an aircraft will become airborne.

Definition Source

Transport Canada, Glossary for Pilots and Air Traffic Services Personnel (TP 11958E)[1]

Note

Exit flight level

Link Semantic Value
Term exit flight level
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Flight Information Region (FIR)

Broader term


Narrower term


Abbreviation

Definition

The flight level at which an aircraft will leave the FIR or the control area.

Definition Source

EUROCONTROL (2001) EATMP Glossary

Note

Expected approach time

Link Semantic Value
Term expected approach time
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Abbreviation

EAT

Definition

The time at which ATC expects that an arriving aircraft, following a delay, will leave the holding fix to complete its approach for a landing.

Definition Source

ICAO, Official definition, ANNEX 2 Rules of the Air, 2005

Note

The actual time of leaving the holding fix will depend upon the approach clearance. (same source)

Filed flight plan

Link Semantic Value
Term filed flight plan
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flight plan

current flight plan

air-filed flight plan

operational flight plan

repetitive flight plan

Broader term


Narrower term


Abbreviation

FPL

Definition

The flight plan as filed with an ATS unit by the pilot or a designated representative, without any subsequent changes.

Definition Source

ICAO, Official definition, PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)

Note

When the word 'message' is used as a suffix to this term, it denotes the content and format of the filed flight plan data as transmitted.

Final approach

Link Semantic Value
Term final approach
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Abbreviation

Definition

That part of an instrument approach procedure which commences at the specified final approach fix or point, or where such a fix or point is not specified,

a) at the end of the last procedure turn, base turn or inbound turn of a racetrack procedure, if specified; or

b) at the point of interception of the last track specified in the approach procedure; and ends at a point in the vicinity of an aerodrome from which:

1) a landing can be made; or

2) a missed approach procedure is initiated.

Definition Source

ICAO, Official definition, Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)

Note

Flight Information Region

Link Semantic Value
Term Flight Information Region
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Upper Flight Information Region (UIR)

Abbreviation

FIR

Definition

An airspace of defined dimensions within which flight information service and alerting service are provided.

Definition Source

ICAO, official definition, AN 2 Rules of the Air 2005

Note

(EUROCONTROL, SASS-C Glossary definition) A three-dimensional area in which aircraft are under control of usually a single authority. Internally a FIR is divided into several geographical areas called sectors. Sometimes one or more FIRs have a combined upper area control.

Flight envelope

Link Semantic Value
Term flight envelope
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Abbreviation

Definition

the range of airspeeds, altitudes and normal load factors at which the aircraft can (safely) operate.

Definition Source

NATO (2005) doc. ref. RTO-AG-300-V14 12, Ch. 12 (flight envelope)

Note

For military aircraft some specific flight envelopes are defined: (...) Operational Flight Envelope, Service Flight Envelope, Permissible Flight Envelope. (same source)

Flight information centre

Link Semantic Value
Term flight information centre
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Mandatory for


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flight information

flight information service

alerting service

Broader term


Narrower term


Abbreviation

FIC

Definition

A unit established to provide flight information service and alerting service.

Definition Source

ICAO, Official definition, AN 2 Rules of the Air, 2005

Note

As indicated by its title, the function of an FIC is to provide “information” useful for the safe and efficient conduct of flights; this is different from the function of units that carry out “control” service (e.g. ACCs), which provide a service aimed at the prevention of collisions as well as the maintenance of an orderly flow of air traffic. [Ref. ICAO Doc 9377, 2008, 4th ed., p. 2-1]

Flight level

Link Semantic Value
Term flight level
Status


Mandatory for


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SESAR

Categories


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Narrower term


Abbreviation

FL

Definition

A surface of constant atmospheric pressure which is related to a specific pressure datum, 1 013.2 hectopascals (hPa), and is separated from other such surfaces by specific pressure intervals.

Definition Source

ICAO, Official term and definition, AN 2 Rules of the Air (2005)

Note

Note 1.– A pressure type altimeter calibrated in accordance with the Standard Atmosphere:

a. when set to a QNH altimeter setting, will indicate altitude;

b. when set QFE altimeter setting, will indicate height above the QFE reference datum;

c. when set to a pressure of 1 013.2 hPa, may be used to indicate flight levels.

Note 2.– The terms "height" and "altitude", used in Note 1 above, indicate altimetric rather than geometric heights and altitude.

General Air Traffic

Link Semantic Value
Term General Air Traffic
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Operational Air Traffic (OAT)

State aircraft

Broader term


Narrower term


Abbreviation

GAT

Definition

all movements of civil aircraft, as well as all movements of State aircraft (including military, customs and police aircraft) when these movements are carried out in conformity with the procedures of the ICAO.

Definition Source

EUROCONTROL (2010) EUROCONTROL Specification for harmonized Rules for Operational Air Traffic (OAT) under Instrument Flight Rules (IFR) inside controlled Airspace of the ECAC Area (EUROAT), Ed. 1.3

Note

Height

Link Semantic Value
Term height
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Broader term


Narrower term


Abbreviation

Definition

The vertical distance of a level, a point, or an object considered as a point, measured from a specified datum.

Definition Source

ICAO, Official definition added to: An 10/I by Amdt 71 (07/11/1996), An 15 by Amdt 33 (25/11/2004) and modified by Amdt 71 to An 10/I (07/11/1996). The note to the official definition appears only in Annex 6/I.

Note

For the purposes of this example, the point referred to above is the lowest part of the aeroplane and the specified datum is the take-off or landing surface, whichever is applicable.

Inadequate separation

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Instrument Flight Rules

Link Semantic Value
Term Instrument Flight Rules
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Visual Flight Rules

Instrument Meteorological Conditions

Broader term


Narrower term


Abbreviation

IFR

Definition

A set of rules governing the conduct of flight under instrument meteorological conditions.

Definition Source

ICAO/OACI, "International Civil Aviation Vocabulary", Doc. 9713, Vol.1, 1998

Note

Intermediate Supplementary Flight Level

Link Semantic Value
Term Intermediate Supplementary Flight Level
Status


Mandatory for


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intermediate flight level (IFL)

Broader term

flight level

Narrower term


Abbreviation

ISL

Definition

If an aircraft cannot reach its IFL on entry of the intermediate sector, its ISL will be set by the Auto so that the aircraft's altitude is guaranteed to be between its ISL and IFL when flying through the intermediate sector.

Definition Source

EUROCONTROL SASS-C Glossary

Note

Intermediate flight level

Link Semantic Value
Term intermediate flight level
Status


Mandatory for


Contexts


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Broader term

flight level

Narrower term


Abbreviation

Definition

The target flight level for the intermediate (second) sector. Aircraft crossing less than three sectors have no intermediate Flight Level.

Definition Source

EUROCONTROL SASS-C Glossary

Note

Lateral separation

Link Semantic Value
Term lateral separation
Status


Mandatory for


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Longitudinal separation

Vertical separation

Broader term

separation

Narrower term


Abbreviation

Definition

Separation between aircraft expressed in terms of distance or angular displacement between tracks

Definition Source

ICAO DOC 9426 Air Traffic Services Planning Manual 1984, p. V-1-1-8

Note

Level

Link Semantic Value
Term level
Status


Mandatory for


Contexts

SESAR

Categories


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Related entries

flight level

height

altitude

Broader term


Narrower term


Abbreviation

LVL

Definition

A generic term relating to the vertical position of an aircraft in flight and meaning variously, height, altitude or flight level.

Definition Source

ICAO,Official definition added to An 3 by Amdt 71 (05/11/1998)

Note

Longitudinal separation

Link Semantic Value
Term '
Status


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Vertical separation

Lateral separation

Broader term

separation

Narrower term


Abbreviation

Definition

Separation between aircraft expressed in units of time or distance along track.

Definition Source

ICAO DOC 9426 Air Traffic Services Planning Manual 1984, p. V-1-1-8

Note

Lower airspace

Link Semantic Value
Term lower airspace
Status


Mandatory for


Contexts


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upper airspace

Broader term

airspace

Narrower term


Abbreviation

Definition

1. Part of airspace below a variable vertical limit.

2. controlled airspace below the division level and outside the terminal or airport airspace. It includes airways linking the airport with upper airspace.

Definition Source

1. EUROCONTROL (2005) Glossary for Flight Statistics & Forecasts, v.1.0

2.EUROCONTROL/EUROPEAN UNION (2009) EPISODE 3 - Single European Sky Implementation support through Validation, D2.4.3-04 - Method for Systematic Risk Assessment for Units of Operation, V. 1.01

Note

Missed approach procedure

Link Semantic Value
Term missed approach procedure
Status


Mandatory for


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Missed Approach

Broader term


Narrower term


Abbreviation

Definition

The procedure to be followed if the approach cannot be continued.

Definition Source

ICAO, "International Civil Aviation Vocabulary", Doc. 9713, Vol.1, 1998

Note

Mixed navigation environment

Link Semantic Value
Term mixed navigation environment
Status


Mandatory for


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area navigation (RNAV)

required navigation performance (RNP)

Broader term


Narrower term


Abbreviation

Definition

An environment where different navigation specifications may be applied within the same airspace (e.g. RNP 10 routes and RNP 4 routes in the same airspace) or where operations using conventional navigation are allowed in the same airspace with RNAV or RNP applications.

Definition Source

ICAO (2010), doc. 9931 (CDO Manual)

Note

Non-radar separation

{{semantic_table

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Operational Air Traffic

Link Semantic Value
Term Operational Air Traffic
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General Air Traffic (GAT)

Broader term


Narrower term


Abbreviation

OAT

Definition

all flights, which do not comply with the provisions stated for GAT and for which rules and procedures have been specified by appropriate national authorities.

Definition Source

EUROCONTROL (2010) EUROCONTROL Specification for harmonized Rules for Operational Air Traffic (OAT) under Instrument Flight Rules (IFR) inside controlled Airspace of the ECAC Area (EUROAT), Ed. 1.3

Note

Operational flight plan

Link Semantic Value
Term operational flight plan
Status


Mandatory for


Contexts


Categories


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flight plan

filed flight plan

current flight plan

air-filed flight plan

repetitive flight plan

Broader term


Narrower term


Abbreviation

Definition

The operator's plan for the safe conduct of the flight based on considerations of helicopter performance, other operating limitations and relevant expected conditions on the route to be followed and at the heliports concerned.

Definition Source

ICAO, Official definition, AN 6/III Operation of Aircraft — International Operations — Helicopters 2001, 5th ed., amdt. 9, chap. 1

Note

Pair-wise separation

Link Semantic Value
Term pair-wise separation
Status


Mandatory for


Contexts

SESAR

Categories


Synonyms


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Broader term


Narrower term


Abbreviation

PWS

Definition

a wake vortex separation based on individual aircraft type.

Definition Source

SESAR (2011) working package 6, Airport Definitions Team

Note

Pressure-altitude

Link Semantic Value
Term pressure-altitude
Status


Mandatory for


Contexts


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Broader term


Narrower term


Abbreviation

Definition

An atmospheric pressure expressed in terms of altitude which corresponds to that pressure in the standard atmosphere.

Definition Source

ICAO (2006) Official definition, Annex 10, Vol. I, Aeronautical Communications - Radio navigation aids

Note

Prohibited area

Link Semantic Value
Term prohibited area
Status


Mandatory for


Contexts


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danger area

restricted area

Broader term

airspace restriction

Narrower term


Abbreviation

Definition

An airspace of defined dimensions, above the land areas or territorial waters of a State, within which the flight of aircraft is prohibited.

Definition Source

ICAO, Official definition,

ANNEX 2 Rules of the Air 2005

ANNEX 4 Aeronautical Charts 2001

ANNEX 15 Aeronautical Information Services 2010

Note

Reduced Vertical Separation Minimum

Link Semantic Value
Term Reduced Vertical Separation Minimum
Status


Mandatory for


Contexts


Categories


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Broader term


Narrower term


Abbreviation

RVSM

Definition

A reduction to 1000 feet vertical separation between flights, which is used in Europe and on the North Atlantic, between FL290 and FL410.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Repetitive flight plan

Link Semantic Value
Term repetitive flight plan
Status


Mandatory for


Contexts

EAEA

Categories


Synonyms


Related entries

flight plan

operational flight plan

current flight plan

filed flight plan

air-filed flight plan

Broader term


Narrower term


Abbreviation

RPL

Definition

1. A flight plan related to a series of frequently recurring, regularly operated individual flights with identical basic features, submitted by an operator for retention and repetitive use by ATS units.

2. An integral part of the Network Operations flight plan processing system serving all Air Traffic Services (ATS) Units within the Flight Plan Message (FPM) Distribution Area. The system receives, processes and stores bulk Repetitive Flight Plan details submitted by the Aircraft Operators.

Definition Source

1. ICAO, Official definition, PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed., Chap. 1

2. EUROCONTROL, NM Glossary (2014)

Note

Restricted area

Link Semantic Value
Term restricted area
Status


Mandatory for


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danger area

prohibited area

Broader term

airspace restriction

Narrower term


Abbreviation

Definition

An airspace of defined dimensions, above the land areas or territorial waters of a State, within which the flight of aircraft is restricted in accordance with certain specified conditions.

Definition Source

ICAO, Official definition,

ANNEX 2 Rules of the Air 2005

ANNEX 4 Aeronautical Charts 2001

ANNEX 15 Aeronautical Information Services 2010

Note

Separation

Link Semantic Value
Term separation
Status


Mandatory for


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Broader term


Narrower term

Lateral separation

Vertical separation

Longitudinal separation

Abbreviation

Definition

Spacing between aircraft, levels or tracks.

Definition Source

ICAO, doc. 9426, 1984, p. V-1-1-11

Note

Separation constraint

Link Semantic Value
Term separation constraint
Status


Mandatory for


Contexts

SESAR

Categories


Synonyms


Related entries


Broader term

constraint

Narrower term


Abbreviation

Definition

The separation to keep aircraft operating safely on final approach.

Examples are minimum radar separation to keep risk of collision to an acceptable safe level and wake turbulence radar separation to keep the risk of an adverse wake turbulence encounter to an acceptable safe level.

Definition Source

SESAR doc. 06.08.01 Operational Concept Description (OCD) and Operational Service and Environment Definition (OSED) for Time Based Separation for Arrivals (TBS)

Note

Separation minima

Link Semantic Value
Term separation minima
Status


Mandatory for


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separation

separation minima infringement

Broader term


Narrower term


Abbreviation

Definition

The minimum displacements between an aircraft and a hazard which maintain the risk of collision at an acceptable level of safety.

Definition Source

ICAO (2008), doc. 9882, Manual on Air Traffic Management System Requirements

Note

Separation minima infringement

Link Semantic Value
Term separation minima infringement
Status


Mandatory for


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separation

separation minima

Broader term


Narrower term


Abbreviation

SMI

Definition

A situation in which prescribed separation minima were not maintained between aircraft.

Definition Source

EUROCONTROL (2000) ESARR 2 - Edition 1.1 - 30.03.2000, Attachment C to Annex 1 ("Glossary of terms and definitions")

Note

Separation mode

Link Semantic Value
Term separation mode
Status


Mandatory for


Contexts


Categories


Synonyms


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Broader term


Narrower term


Abbreviation

Definition

An approved set of rules, procedures and conditions of application associated with separation minima.

Definition Source

ICAO (2008), doc. 9882, Manual on Air Traffic Management System Requirements

Note

Separation provision

Link Semantic Value
Term separation provision
Status


Mandatory for


Contexts


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Broader term


Narrower term


Abbreviation

Definition

The tactical process of keeping aircraft away from hazards by at least the appropriate separation minima.

Definition Source

ICAO (2008), doc. 9882, Manual on Air Traffic Management System Requirements

Note

Spacing

Link Semantic Value
Term spacing
Status


Mandatory for


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Broader term


Narrower term


Abbreviation

Definition

Any application of a distance or time between an aircraft and a hazard at or above separation minima in order to maintain an orderly flow of traffic.

Definition Source

ICAO (2008), doc. 9882, Manual on Air Traffic Management System Requirements

Note

Strategic Lateral Offset Procedure

Link Semantic Value
Term Strategic Lateral Offset Procedure
Status


Mandatory for


Contexts


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Broader term


Narrower term


Abbreviation

SLOP

Definition

"an initiative ... developed to increase the lateral separation between aircraft with very accurate navigation systems on adjacent levels in case of altitude deviation errors. SLOP allows pilots to fly either the centreline, 1NM or 2NM to the right of centreline. SLOP may be applied from the Oceanic entry point, returning to centreline at the Oceanic exit point, by any aircraft with automatic offset programming capability".

Definition Source

NATS (2010) article by Karen Bolton, [2]

Note

Supplementary crossing level

Link Semantic Value
Term '
Status


Mandatory for


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Broader term


Narrower term


Abbreviation

Definition

A level, at or above which, or at or below which a flight has been co-ordinated to cross the transfer of control point. The supplementary level, if present, is an element of the exit level.

Definition Source

EUROCONTROL Standard Document For On-Line Data Interchange (OLDI), Edition Number : 4.00, Edition Date : 12/06/2007

Note

System flight plan

Link Semantic Value
Term system flight plan
Status


Mandatory for


Contexts


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Flight Data Processing System (FDPS)

Flight plan

Broader term


Narrower term


Abbreviation

Definition

Information derived from the flight plan of a specific flight held within an FDPS.

Definition Source

EUROCONTROL (2003) Standard for On-line Data Interchange, DPS-ET1-ST06-STD-01-00

Note

Total Estimated Elapsed Time

Link Semantic Value
Term Total Estimated Elapsed Time
Status


Mandatory for


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Broader term


Narrower term


Abbreviation

TTL EET, TTEET, EET

Definition

For IFR flights, the estimated time required from take-off to arrive over that designated point, defined by reference to navigation aids, from which it is intended that an instrument approach procedure will be commenced, or, if no navigation aid is associated with the destination aerodrome, to arrive over the destination aerodrome. For VFR flights, the estimated time required from take-off to arrive over the destination aerodrome.

Definition Source

ICAO (2005), Annex 2, Rules of the Air

Note

Transfer flight level

Link Semantic Value
Term transfer flight level
Status


Mandatory for


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Broader term

flight level

Narrower term


Abbreviation

Definition

1. the flight level agreed during the coordination if in level flight, or the cleared flight level to which the flight is proceeding if climbing or descending at the coordination point.

2. The flight level at which a flight has been or will be coordinated to cross one point (flight level number); if in level flight, or the cleared level to which it is proceeding if climbing or descending at the boundary point.

Definition Source

1. EUROPEAN COMMISSION (2006) COMMISSION REGULATION (EC) No 1032/2006 of 6 July 2006 laying down requirements for automatic systems for the exchange of flight data for the purpose of notification, coordination and transfer of flights between air traffic control units, Definitions

2. EUROCONTROL Standard Document For On-Line Data Interchange (OLDI), Edition Number : 3.00, Edition Date : 31/10/2003

Note

Uncontrolled aerodrome

Link Semantic Value
Term uncontrolled aerodrome
Status


Mandatory for


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Controlled aerodrome

Broader term


Narrower term


Abbreviation

Definition

An aerodrome at which a control tower has not been established. This designation also applies during the non-operational period when an established control tower is on reduced hours (part time).

Definition Source

Transport Canada - Glossary http://www.tc.gc.ca/

Note

Upper Flight Information Region

Link Semantic Value
Term Upper Flight Information Region
Status


Mandatory for


Contexts


Categories


Synonyms

Upper Information Region

Related entries

upper airspace

Broader term

Flight Information Region (FIR)

Narrower term


Abbreviation

UIR

Definition

a Flight Information Region, which covers upper airspace only.

Definition Source

EUROCONTROL (2005) Glossary for Flight Statistics & Forecasts, v. 1.0 [3]

Note

Upper airspace

Link Semantic Value
Term upper airspace
Status


Mandatory for


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Upper Flight Information Region (UIR)

lower airspace

Broader term

airspace

Narrower term


Abbreviation

Definition

1. Part of airspace above a variable vertical limit.

2. controlled airspace used mainly by jets in the cruise flight phase.

Definition Source

1. EUROCONTROL (2005) Glossary for Flight Statistics & Forecasts, v1.0 [4]

2. EUROCONTROL/EUROPEAN UNION (2009) EPISODE 3 - Single European Sky Implementation support through Validation, D2.4.3-04 - Method for Systematic Risk Assessment for Units of Operation, V. 1.01

Note

In Europe, the Upper Information Region (UIR) is defined as airspace above a division level (generally FL195). It may vary in different countries. Maastricht Upper Area Control Centre (MUAC) covers airspace above FL245 in Belgium, the Netherlands, Luxembourg and NW Germany. In the USA, UIRs are not used, but high altitude en-route sectors typically begin at FL240. Upper airspace is controlled through area control centres (ACC) in Europe or ATC centres (ATCC) in the USA. Categorisation varies, e.g. Class C in most of ECAC; Class B in the UK until 2006; and Class A in the USA.

Note Source

EPISODE 3 (see above)

Vertical separation

Link Semantic Value
Term vertical separation
Status


Mandatory for


Contexts


Categories


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Longitudinal separation

Lateral separation

Broader term

separation

Narrower term


Abbreviation

Definition

Separation between aircraft expressed in units of vertical distance

Definition Source

ICAO DOC 9426 Air Traffic Services Planning Manual 1984, p. V-1-1-10

Note

Visual Flight Rules

Link Semantic Value
Term Visual Flight Rules
Status


Mandatory for


Contexts


Categories


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Related entries

Instrument Flight Rules

Visual Meteorological Conditions

Broader term


Narrower term


Abbreviation

VFR

Definition

A set of rules governing the conduct of flight under visual meteorological conditions.

Definition Source

ICAO Reference DOC 9815 Manual on Laser Emitters and Flight Safety 2003, 1st ed.

Note



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