FullDescription:ATFM

ATC Flight Plan Change message

Link	Semantic Value
Term	ATC Flight Plan Change message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ACH

Definition

message sent by the IFPS system after reception of an AFP or FNM/MFS, if the route is different to the route in the Flight plan already in the system.

Definition Source

EUROCONTROL, CFMU Glossary, September 2011

Note

AFP = ATC Flight plan Proposal message FNM = Flight Notification Message MFS = Message from Shanwick

ATC Flight Plan Message

Link	Semantic Value
Term	ATC Flight Plan Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

APL

Definition

message sent by the IFPS system after reception of an AFP or FNM/MFS if no Flight Plan already exists in the system.

Definition Source

EUROCONTROL, CFMU Glossary, September 2011

Note

AFP = ATC Flight Plan Proposal message

FNM = Flight Notification message

ATC-DPI

Link	Semantic Value
Term	ATC-DPI
Status
Mandatory for
Contexts
Categories
Synonyms	ATC-Departure Planning Information message
Related entries	Actual Take-Off Time (ATOT) Target Take-Off Time (TTOT)
Broader term	departure planning information (DPI)
Narrower term

Abbreviation

A-DPI

Definition

DPI message sent by the CDM-Airport to the CFMU (ETFMS) notifying the target take-off time (TTOT) between ATC time of predeparture sequencing and the actual take-off time (ATOT)

Definition Source

EUROCONTROL (2006), Airport CDM Operational Concept Document, Ed. 3

Note

The ATFCM plan created by the Network Management Cell (NMC) the day before the day of Operations (Day - 1), consisting of a set of Tactical ATFCM measures (e.g. activation of Routeing Scenarios, regulations, etc.) agreed with all partners concerned. Promulgated by means of ANM and Network News.

Definition Source

EUROCONTROL, NM Glossary (2014)

ATFCM Notification Message

Link	Semantic Value
Term	ATFCM Notification Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Air Traffic Flow and Capacity Management (ATFCM)
Narrower term

Abbreviation

ANM

Definition

The official medium for the notification of Air Traffic Flow & Capacity Management (ATFCM) measures, published by the Network Manager Operations Centre (NMOC) during the day before the day of operation (D-1), in order to provide a summary of planned ATFCM measures, and to promulgate any specific instructions or communication requirements associated with those measures.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

The ANM may be updated on the day of operation, either by 'Change', 'Cancellation' or 'New' messages.

ATFCM incident

Link	Semantic Value
Term	ATFCM incident
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Air Traffic Flow and Capacity Management (ATFCM)
Narrower term

Abbreviation

Definition

A significant occurrence affecting an air traffic services unit, an aircraft operator or a Central Management Unit resulting from the application of air traffic flow management measures or procedures.

Definition Source

EUROCONTROL, Supplement to the CFMU Handbook, ATFCM OPERATING PROCEDURES FOR FMP, Ed. 15 (2011)

Note

ATFM System of the European Region

Link	Semantic Value
Term	ATFM System of the European Region
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ASTER

Definition

The Air Traffic Flow Management System of the European Region comprises two Central Management Units, specifically the EUROCONTROL Central Flow Management Unit and the International Air Navigation Service “East”, which are supported by Flow Management Positions in local air traffic control units.

Definition Source

ICAO Doc 7754, Volume II, Part V.III

Note

ATFM airport delay

Link	Semantic Value
Term	ATFM airport delay
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	ATFM delay
Broader term
Narrower term

Abbreviation

Definition

Delay caused by regulation based on traffic volume which has a reference location classified as AZ (Aerodrome Zone) or AD (Aerodrome)

Definition Source

EUROCONTROL, First Performance Review Report (PRR1), Annex 13, Definitions, 4 June 1999

Note

ATFM delay

Link	Semantic Value
Term	ATFM delay
Status
Mandatory for
Contexts
Categories
Synonyms	Air Traffic Flow Management Delay
Related entries	ATFM en-route delay air traffic flow management airport delay
Broader term
Narrower term

Abbreviation

Definition

the duration between the last take-off time requested by the aircraft operator and the take-off slot allocated by the Central Flow Management Unit following a regulation communicated by the FMP, in relation to an airport (airport delay) or sector (en-route delay) location.

Definition Source

EUROCONTROL, Local Convergence and Implementation Plan GERMANY, Years 2008-2012, Level 1

Note

It is expressed in minutes.

ATFM departure slot

Link	Semantic Value
Term	ATFM departure slot
Status
Mandatory for	EU Commission
Contexts
Categories
Synonyms	air traffic flow management departure slot
Related entries	Calculated Take-Off Time
Broader term
Narrower term

Abbreviation

Definition

a calculated take-off time attributed by the central unit for ATFM with a time tolerance managed by the local ATS unit.

Definition Source

COMMISSION REGULATION (EU) No 255/2010 of 25 March 2010 laying down common rules on air traffic flow management

Note

ATFM en-route delay

Link	Semantic Value
Term	ATFM en-route delay
Status
Mandatory for
Contexts
Categories
Synonyms	en-route ATFM delay Air Traffic Flow Management En-route Delay
Related entries	ATFM delay
Broader term
Narrower term

Abbreviation

Definition

1. Delay caused by regulation based on traffic volume which has a reference location classified as AS (Airspace) or SP (Special Point).

2. ATFM delay caused by regulations applied by the CFMU at the request of the FMP to protect en-route ATC sectors from overload.

Definition Source

1. EUROCONTROL, First Performance Review Report (PRR1), Anex 13, Definitions, 4 June 1999

2. EUROCONTROL (2002) ATM Airport Performance (ATMAP) Framework, Measuring Airport Airside and Nearby Airspace Performance, Report commissioned by the Performance Review Commission, December 2009 (definition referring to: Capacity Workshop, 12 April 2002)

Note

ATFM measure

Link	Semantic Value
Term	ATFM measure
Status
Mandatory for
Contexts
Categories
Synonyms	air traffic flow management measure
Related entries
Broader term
Narrower term

Abbreviation

Definition

the actions taken to perform air traffic flow management and capacity management.

Definition Source

COMMISSION REGULATION (EU) No 255/2010 of 25 March 2010 laying down common rules on air traffic flow management

Note

ATS Data Exchange Presentation

Link	Semantic Value
Term	ATS Data Exchange Presentation
Status
Mandatory for
Contexts
Categories
Synonyms	ATS Data Exchange Protocol Format ADEXP Format
Related entries
Broader term
Narrower term

Abbreviation

ADEXP

Definition

A format, rather than a protocol, used primarily in on-line computer-to-computer message exchange. Specific uses include flight planning and Air Traffic Flow & Capacity Management (ATFCM) messages.

Definition Source

EUROCONTROL, NM Glossary (2014)

ATS environment data base

Link	Semantic Value
Term	ATS environment data base
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ENV

Definition

A specific part of the Central Flow Management Unit (CFMU) Data Base containing all environment data concerning airspace organisation and structure, ACC operational organisation and ATC capacities.

Definition Source

EUROCONTROL (2004) EATM glossary, June 2004

and EUROCONTROL MANUAL FOR AIRSPACE PLANNING, Volume 2 (2003)

Note

The ATS Environment Data Base is used by the CFMU systems for the calculation of flight profiles taking account of all the airspace constraints.

Acknowledgement message

Link	Semantic Value
Term	Acknowledgement message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ACK

Definition

a means whereby the IFPS indicates successful processing of a submitted message against the environmental data held by Network Operations at the time of processing that message.

Such a processing may only take into account the criteria specified by the relevant member states against which they require flight plan messages to be checked by the IFPS.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Actual Time Over

Link	Semantic Value
Term	Actual Time Over
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ATO

Definition

the time at which a flight will actually arrive over an area based on flight plan activation information.

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

Air Traffic Flow and Capacity Management Information Message

Link	Semantic Value
Term	Air Traffic Flow and Capacity Management Information Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

AIM

Definition

A message transmitted by the Network Manager Operations Centre (NMOC) to provide information, advice and to promulgate instructions relating to the application of current Air Traffic Flow & Capacity Management (ATFCM) measures. It is also used for the initial publication of the Network Operations ATFCM operating procedures that affect all users.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Aircraft Operator What-If-Reroute

Link	Semantic Value
Term	Aircraft Operator What-If-Reroute
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Enhanced Tactical Flow Management System (ETFMS) Common Human Machine Interface (CHMI)
Broader term
Narrower term

Abbreviation

AOWIR, AO-WIR

Definition

A function within ETFMS where the Aircraft Operator (AO) can interrogate the ATFCM systems for a possible reroute, using the CFMU Common Human Machine Interface (CHMI) or the Network Operations Portal (NOP).

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Average ATFM delay

Link	Semantic Value
Term	average ATFM delay
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	ATFM delay average ATFM delay per delayed flight
Broader term
Narrower term

Abbreviation

Definition

Total minutes of departure delay/Total number of flights (where total minutes of departure delay is accumulated over all flights).

Definition Source

EUROCONTROL, First Performance Review Report (PRR1), Anex 13, Definitions, 4 June 1999

Note

CFMU Data Warehouse

Link	Semantic Value
Term	CFMU Data Warehouse
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

DWH

Definition

a data warehouse used to store historical information of the core systems ETFMS, IFPS and ENV. It also stores statistics and key performance indicators in support of strategic, pre-tactical and tactical decision making.

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

CFMU Slot Issue Time

Link	Semantic Value
Term	CFMU Slot Issue Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Central Flow Management Unit (CFMU) Slot Allocation Message (SAM)
Broader term
Narrower term

Abbreviation

SIT1

Definition

The time when the CFMU issues the SAM (Slot Allocation Message). This is normally two hours before EOBT (Estimated Off-Block Time).

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010 [1]

Note

CFMU System Operations

Link	Semantic Value
Term	CFMU System Operations
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

CSO

Definition

"...the supervision of CFMU applications, infrastructure, systems and networks to ensure the continuous availability of the data processing and data communication facilities of the Air Traffic Flow Management services."

Definition Source

EUROCONTROL (2008) webpage on the CFMU System Operation Section [2]

Note

CFMU Tactical System

Link	Semantic Value
Term	CFMU Tactical System
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

TACT

Definition

a system [formerly] used by the Flow Management Division (FMD) and Flow Management Positions (FMP) for Tactical operations. TACT receives data from the Integrated Initial Flight Plan Processing System (IFPS) and the ENV Systems.

Its main functions are:

a) The presentation of the planned and actual traffic situation to enable the FMD and FMPs to monitor and modify the operation of the ATFM plan as required on the day of operation.

b) The provision of Computer-Assisted Slot Allocation (CASA).

c) The assessment of rerouteings for flows and individual flights.

Definition Source

EUROCONTROL (2002) Basic CFMU Handbook, Ed. 8

Note

predecessor of the Enhanced Tactical Flow Management System (ETFMS)

CFMU archive

Link	Semantic Value
Term	CFMU archive
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ARC

Definition

Historical Air Traffic Flow & Capacity Management (ATFCM) data retrieved from the Data Warehouse (DWH) by Network Operations.

Archive data is used in the Strategic and Pre-Tactical ATFCM phases as well as for incident investigation.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Calculated Off-Block Time

Link	Semantic Value
Term	Calculated Off Block Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

COBT

Definition

CTOT (Calculated Take-Off Time) minus taxi time.

COBT is use within the AOWIR tool to define the time when, for a regulated flight, the functions ‘Apply’ and Apply/File’ are no longer available (45 minutes before COBT).

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

Calculated Take-Off Time

Link	Semantic Value
Term	Calculated Take-Off Time
Status
Mandatory for
Contexts	EUROCONTROL, SESAR, ICAO
Categories
Synonyms
Related entries	ATFM departure slot Actual Take-Off Time (ATOT) Estimated Take-Off Time (ETOT) Target Take-Off Time (TTOT)
Broader term
Narrower term

Abbreviation

CTOT

Definition

1.A time calculated and issued by the Central Flow Management unit, as a result of tactical slot allocation, at which a flight is expected to become airborne.

2.An Air Traffic Flow & Capacity Management (ATFCM) departure slot, forming part of an Air Traffic Control (ATC) clearance, which is issued to a flight affected by Network Management regulations. It is defined by a time and tolerance (-5 to +10 minutes) during which period the flight is expected to take-off.

Definition Source

1. EUROCONTROL/IATA/ACI, Airport CDM Implementation Manual, V.4, March 2012

2. NM Glossary (2014)

Note

Reference: ICAO Doc 7030/4 – EUR, Table 7

Lexicon Release

Lexicon Release 2016.1

Calculated time over

Link	Semantic Value
Term	calculated time over
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Central Management Unit (CMU)
Broader term
Narrower term

Abbreviation

CTO

Definition

1. A time calculated by the appropriate central management unit at which an aircraft will arrive at a specified point, taking into account tactical slot allocation.

2. The time at which a regulated flight will arrive over an area based on its Calculated Take-Off Time (CTOT).

Definition Source

1. ICAO, EUR ANP FASID – Part V.III-ATFM Attachment D, Air Traffic Flow Management (ATFM) Terms and Meanings for use in the Air Traffic Flow Management System of the European Region (ASTER) November 2008, Working Copy

2. EUROCONTROL, NM Glossary (2014)

Cancel-DPI

Link	Semantic Value
Term	Cancel-DPI
Status
Mandatory for
Contexts
Categories
Synonyms	Cancel - Departure Planning Information message
Related entries
Broader term	departure planning information (DPI)
Narrower term

Abbreviation

C-DPI

Definition

"message inform(ing) the Central Flow Management Unit (CFMU) that previously sent DPI is no longer valid"

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, issue 3.1, July 2010

Note

Central Executive Unit

Link	Semantic Value
Term	Central Executive Unit
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Air Traffic Flow Management (ATFM)
Broader term
Narrower term

Abbreviation

CEU

Definition

A self-contained international unit responsible for the planning, coordination and execution of all ATFM measures.

Definition Source

ICAO, Doc 7754, 1998, 24th ed., Part V, p. 5-A-1

Note

Central Flow Management Unit

Link	Semantic Value
Term	Central Flow Management Unit
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Central Management Unit (CMU)
Broader term
Narrower term

Abbreviation

CFMU

Definition

1. A directorate of Eurocontrol, located in Brussels. Now called "Network Manager Directorate (NMD)".

2. A Central Management Unit operated by EUROCONTROL.

Definition Source

1. EUROCONTROL, CFMU Glossary 2011

2. ICAO Doc 7754, Volume I, Part V.III

Note

Previous name of the Network Operations systems and services provided by the Eurocontrol Network Management Directorate (NMD), Network Operations Management division (NOM), Network OperationS unit (NOS).

Note Source

EUROCONTROL, NM Glossary (2014)

Central Management Unit

Link	Semantic Value
Term	Central Management Unit
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Central Flow Management Unit (CFMU)
Broader term
Narrower term

Abbreviation

CMU

Definition

A centralised unit providing air traffic flow management services within a specified area of responsibility.

Definition Source

ICAO Doc 7754, Volume II, Part V.III

Note

Central Management Unit Contingency Plan

{{semantic_table

|term=Central Management Unit Contingency Plan
|status=
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Centralised Traffic Management Organisation

Link	Semantic Value
Term	Centralised Traffic Management Organisation
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

CTMO

Definition

an ICAO concept which foresaw a central flow management unit supported by Flow Management Positions (FMPs) in each Area control centre (ACC).

Definition Source

EUROCONTROL (2011) Directorate Network Management (DNM) BASIC CFMU HANDBOOK, Ed.15

Note

Chaotic Situation Management

Link	Semantic Value
Term	Chaotic Situation Management
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

CHAMAN

Definition

A specific procedure created [...] to improve the accuracy of the Network Operations data and to overcome the problems associated with slot compliance during periods of adverse operating conditions at aerodromes. This procedure allows greater flexibility to the FMP/TWR giving them the freedom to manage the departure order based on what they can achieve, taking into account local conditions.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

CHAMAN is currently only available at specific aerodromes. Each aerodrome qualifying for the procedure must have agreed with the CFMU a detailed plan and instituted CDM procedures with which all parties concerned (AOs, Airports, ATCs, Handling Agents etc.,) have agreed to comply. This process is managed by the CFMU and should be used as a last resort, when all other methods have been exhausted. (same source)

Note Source

EUROCONTROL (2011) DMEAN webpage, CHAMAN

Collaborative Management of Flight Updates

Link	Semantic Value
Term	Collaborative Management of Flight Updates
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	departure planning information (DPI)
Broader term
Narrower term

Abbreviation

COFU

Definition

"The Collaborative Management of Flight Updates Element consists of exchanging Flight Update Massages (FUM) and Departure Planning Information (DPI) messages between the CFMU and a CDM airport to provide estimates for arriving flights to CDM airports and improve the ATFM slot management process for departing flights."

Definition Source

EUROCONTROL (2009) "Airport CDM Functional Requirements Document", V.4.0

Note

"The aim is to improve the coordination between Air Traffic Flow and Capacity Management (ATFCM) and airport operations at a CDM airport." (same source)

Collaborative Predeparture Sequence

Link	Semantic Value
Term	Collaborative Predeparture Sequence
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

CPSQ

Definition

"the order that aircraft are planned to depart from their stands (push off blocks) taking into account partner's preferences.

Definition Source

EUROCONTROL (2009) "Airport CDM Functional Requirements Document", V.4.0

Note

"It should not be confused with the pre-take off order where ATC organise aircraft at the holding point of a runway." (same source)

Computer-Assisted Slot Allocation

Link	Semantic Value
Term	Computer-Assisted Slot Allocation
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	slot allocation
Narrower term

Abbreviation

CASA

Definition

Part of the Enhanced Tactical Flow Management System (ETFMS) which provides automatic message exchange in the form of Slot Allocation Messages and other Air Traffic Flow and Capacity Management (ATFCM) messages.Predecessor of REM.

Definition Source

EUROCONTROL, NM Glossary 2014

Note

Correlated Position Report

Link	Semantic Value
Term	Correlated Position Report
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

CPR

Definition

Aircraft position data derived from Air Traffic Control (ATC) surveillance systems, normally updated every 1 to 3 minutes.

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

Cruising level

Link	Semantic Value
Term	cruising level
Status
Mandatory for
Contexts	EAEA
Categories
Synonyms
Related entries
Broader term
Narrower term

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 Tactical Flight Model

Link	Semantic Value
Term	Current Tactical Flight Model
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

CTFM

Definition

A mathematical model containing a point profile and airspace volume profile created in the Enhanced Tactical Flow Management System (ETFMS) for a flight which has been activated. (Called Actual Profile on CHMI.)

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

De-Suspension Message

Link	Semantic Value
Term	De-Suspension Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

DES

Definition

A message sent by ETFMS to a suspended flight when the reason for a suspension no longer applies and the flight is not regulated.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

De-suspension

Link	Semantic Value
Term	de-suspension
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Air Traffic Flow Management (ATFM)
Broader term
Narrower term

Abbreviation

Definition

The re-activation of a flight following an air traffic flow management suspension.

Definition Source

ICAO Doc 7030 - EUR, Chapter 10

Note

Departure Tolerance Window

Link	Semantic Value
Term	Departure Tolerance Window
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Estimated Take-Off Time (ETOT) Slot Tolerance Window (STW)
Broader term
Narrower term

Abbreviation

DTW

Definition

Time window around the ETOT in which a flight should be taking off. By default 15 minutes before and 15 minutes after ETOT. This value can be updated in ETFMS.

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

ETFMS uses a Slot Tolerance Window (STW) for regulated flights and a Departure Tolerance Window (DTW) for non regulated flights. These windows are used for the production of statistics and for the processing of DPI messages.

Note Source

EUROCONTROL (2011) CFMU, DPI Implementation Guide

Departure planning information

Link	Semantic Value
Term	departure planning information
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Standard Instrument Departure (SID)
Broader term
Narrower term	Early-DPI (E-DPI) Target-DPI (T-DPI) ATC-DPI (A-DPI) Cancel-DPI (C-DPI)

Abbreviation

DPI

Definition

Messages exchanged between a CDM airport and ETFMS giving a target take off time, taxitime, aircraft type/registration and SID.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Several messages are sent to ETFMS giving a Target Take Off Time. Early DPI (E-DPI), Target DPI (T-DPI-t + T-DPI-s), ATC DPI (A-DPI), Cancel DPI (C-DPI).

Directorate Network Management

Link	Semantic Value
Term	Directorate Network Management
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

Definition Source

EUROCONTROL, CFMU User Forum 2011 webpage [3]

Note

Early-DPI

Link	Semantic Value
Term	'
Status
Mandatory for
Contexts
Categories
Synonyms	Early - Departure Planning Information message
Related entries	Estimated Take-Off Time (ETOT)
Broader term	departure planning information
Narrower term

Abbreviation

E-DPI

Definition

First DPI message that is sent from the CDM-A to the CFMU (ETFMS) notifying the ETOT.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, issue 3.1, July 2010

Note

Enhanced Tactical Flow Management System

Link	Semantic Value
Term	Enhanced Tactical Flow Management System
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ETFMS

Definition

Enhanced version of the previous TACT system, which is a monitoring tool that supports decision making in short-term tactical actions.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

successor of the CFMU Tactical System (TACT). It receives data from the Integrated Initial Flight Plan Processing System (IFPS) and the Environment Database (ENV) systems as well as actual (live) data from the Air Navigation Service Providers (ANSP) and meteorological data.

Note Source

EUROCONTROL, NM Glossary (2014)

Estimated Off-Block Date

Link	Semantic Value
Term	Estimated Off-Block Date
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

EOBD

Definition

the estimated date on which the aircraft will commence movement associated with departure.

Definition Source

EUROPEAN UNION (2006) COMMISSION REGULATION (EC) No 1033/2006 of 4 July 2006 laying down the requirements on procedures for flight plans in the pre-flight phase for the single European sky

Note

Estimated Time Over

Link	Semantic Value
Term	Estimated Time Over
Status
Mandatory for
Contexts
Categories
Synonyms	estimated time over significant point
Related entries
Broader term
Narrower term

Abbreviation

ETO

Definition

Estimated entry time over an airspace for a non-regulated flight based on flight plan data and Environment Database (ENV) data.

Definition Source

EUROCONTROL, CFMU Glossary 2011

Note

ICAO terminology: estimated time over significant point

Estimated time of departure

Link	Semantic Value
Term	estimated time of departure
Status
Mandatory for
Contexts
Categories
Synonyms	estimated departure time
Related entries
Broader term
Narrower term

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)[4]

Note

European Crisis Visualisation Interactive Tool for ATFCM

Link	Semantic Value
Term	European Crisis Visualisation Interactive Tool for ATFCM
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Network Operations Plan (NOP)
Broader term
Narrower term

Abbreviation

EVITA

Definition

a functionality embedded in the NOP Portal, aiming to support management of crises and major disruptions in the European network

Definition Source

EUROCONTROL (2012) EVITA brochure, [5]

Note

Exceptional conditions

Link	Semantic Value
Term	exceptional conditions
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

XCD

Definition

(ATFM) A set of measures that are applied in the Tactical/Pre-tactical phase of Air Traffic Flow and Capacity Management (ATFCM) in respect of an unusual event, such as a strike, aerodrome closure or low visibility.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

FAA Departure Information

Link	Semantic Value
Term	FAA Departure Information
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

FDI

Definition

messages in XML format, sent by FAA to ETFMS when a flight is being given its Oceanic Clearance, containing the time of departure and estimated time of arrival. It can be compared to a CPR/APR.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Filed Tactical Flight Model

Link	Semantic Value
Term	Filed Tactical Flight Model
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

FTFM

Definition

A mathematical model containing a point and airspace volume profile created in Enhanced Tactical Flow Management System (ETFMS) for a flight when Flight plan details, and any subsequent changes, are received from Network Operations.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Called Estimated Profile on CHMI.

First System Activation message

Link	Semantic Value
Term	First System Activation message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Enhanced Tactical Flow Management System (ETFMS)
Broader term
Narrower term

Abbreviation

FSA

Definition

a message sent to the Enhanced Tactical Flow Management System (ETFMS) by an Air Traffic Control (ATC) computer when a flight is activated. The message includes flight level, entry time and position for the flight and is used to update ETFMS.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Flight Activation Monitoring

Link	Semantic Value
Term	Flight Activation Monitoring
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Enhanced Tactical Flow Management System (ETFMS)
Broader term
Narrower term

Abbreviation

FAM

Definition

ETFMS process which suspends flights if not taking off after 30 minutes after E/CTOT.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Flight Suspension message

Link	Semantic Value
Term	Flight Suspension message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

FLS

Definition

ETFMS message sent suspending a flight, which thereafter should not get take-off clearance.

Definition Source

EUROCONTROL, NM Glossary (2014)

Flight Update Message

Link	Semantic Value
Term	Flight Update Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Network Manager Directorate (NMD) Estimated Landing Time (ELDT)
Broader term
Narrower term

Abbreviation

FUM

Definition

A message sent from the ETFMS to a CDM Airport providing an ELDT, ETO (Estimated Time Over) and flight level at the last point of route.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Flight plan suspension

Link	Semantic Value
Term	flight plan suspension
Status
Mandatory for	EU
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

the process initiated by an entity performing ATFM to ensure that a change is made to the flight plan by the operator before the execution of the flight.

Definition Source

COMMISSION REGULATION (EU) No 255/2010 of 25 March 2010 laying down common rules on air traffic flow management

Note

Flow Management Position

Link	Semantic Value
Term	Flow Management Position
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Central Management Unit (CMU)
Broader term
Narrower term

Abbreviation

FMP

Definition

1. A working position established in appropriate air traffic control units to ensure the necessary interface with a central management unit on matters concerning the provision of the air traffic flow management service.

2. The interface between Air Traffic Control (ATC) and the Network Manager Operations Centre (NMOC) established in the States within, and adjacent to, the ECAC area.

Definition Source

1. ICAO Doc 7754, Volume II, Part V.III

2. EUROCONTROL, NM Glossary (2014)

IFPS Zone

Link	Semantic Value
Term	IFPS Zone
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Integrated Initial Flight Plan Processing System (IFPS)
Narrower term

Abbreviation

IFPZ

Definition

The Flight Plan Message (FPM) Distribution Area.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Individual Flight Plan Identity code

Link	Semantic Value
Term	Individual Flight Plan Identity code
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Integrated Initial Flight Plan Processing System (IFPS) Enhanced Tactical Flow Management System (ETFMS)
Broader term	Flight plan
Narrower term

Abbreviation

IFPLID

Definition

A unique identifier assigned to a flight by IFPS. It will be in all ADEXP messages issued by Network Management.

ETFMS will accept the IFPLID when provided in an incoming message in ADEXP format. Therefore, messages originated by AOs may include the IFPLID, preferably only if generated automatically. Aircraft Operators may extract the IFPLID from the ACK message.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Initial Off-Block Date

Link	Semantic Value
Term	Initial Off-Block Date
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Estimated Off-Block Date (EOBD)
Broader term
Narrower term

Abbreviation

IOBD

Definition

the 'off-block date' as given in the FPL and updated by flight plan associated messages (DLA, CHG, etc.).

This is the reference date used for accessing the flight plan in the database and is the only 'offblock date' known by the concerned ATS units.

Definition Source

EUROCONTROL (2007) EUROCONTROL SPECIFICATION for ATS Data Exchange Presentation (ADEXP) Edition 3.0 [6]

Note

The IOBD is not affected by changes requested or notified through the exchange of ATFM messages.

Initial Off-Block Time

Link	Semantic Value
Term	Initial Off-Block Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Estimated Off-Block Time (EOBT)
Broader term
Narrower term

Abbreviation

IOBT

Definition

the off-block time as given in the FPL and updated by flight plan associated messages (DLA, CHG, etc.).

This is the reference time used for accessing the flight plan in the database and is the only off-block time known by the concerned ATS units.

Definition Source

EUROCONTROL (2007) EUROCONTROL SPECIFICATION for ATS Data Exchange Presentation (ADEXP) Edition 3.0, [7]

Note

The IOBT is not affected by changes requested or notified through the exchange of ATFM messages.

Initial flight plan

Link	Semantic Value
Term	initial flight plan
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Flight plan
Broader term
Narrower term

Abbreviation

Definition

the flight plan initially submitted by the originator including changes, if any, initiated and accepted by pilots, operators, an ATS unit or the centralised service for flight planning processing and distribution of flight plans during the pre-flight phase.

Definition Source

EUROCONTROL (2006) COMMISSION REGULATION (EC) No 1033/2006 of 4 July 2006 laying down the requirements on procedures for flight plans in the pre-flight phase for the single European sky

Note

Integrated Initial Flight Plan Processing System

Link	Semantic Value
Term	Integrated Initial Flight Plan Processing System
Status
Mandatory for
Contexts
Categories
Synonyms	Integrated Flight Plan Processing System
Related entries	Central Flow Management Unit (CFMU)
Broader term
Narrower term

Abbreviation

IFPS

Definition

A system of the Network Manager Operations Centre (NMOC) designed to rationalise the reception, initial processing and distribution of flight plan data related to IFR flight within the area covered by the participating States.

Definition Source

ICAO Doc 7030 - EUR, Chapter 2

Note

Integrated Initial Flight Plan Processing System Validation system

Link	Semantic Value
Term	Integrated Initial Flight Plan Processing System Validation system
Status
Mandatory for
Contexts
Categories
Synonyms	IFPS validation system
Related entries
Broader term
Narrower term

Abbreviation

IFPUV

Definition

A separate system, totally independent of the operational IFPS, established solely for the purpose of submitting test Flight Plans.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Key field

Link	Semantic Value
Term	key field
Status
Mandatory for
Contexts
Categories
Synonyms	keyfield
Related entries
Broader term
Narrower term

Abbreviation

Definition

FPL items used by IFPS for association purposes. These items are: ARCID, ADEP, ADES, DOF, EOBT, TTL_EET.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Level capping

Link	Semantic Value
Term	level capping
Status
Mandatory for
Contexts
Categories
Synonyms	flight level capping
Related entries
Broader term
Narrower term

Abbreviation

Definition

Air Traffic Flow and Capacity Management (ATFCM) measure limiting the highest flight level that can be flight planned between two airports, or an airport and a waypoint or waypoints, or between two waypoints, in order to reduce traffic demand in the airspace above a pre-determined flight level.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Local ATFM unit

Link	Semantic Value
Term	local ATFM unit
Status
Mandatory for
Contexts
Categories
Synonyms	local air traffic flow management unit
Related entries
Broader term
Narrower term

Abbreviation

Definition

a flow management entity operating on behalf of one or more other flow management entities as the interface between the central unit for ATFM and an ATS unit or a group of such units.

Definition Source

COMMISSION REGULATION (EU) No 255/2010 of 25 March 2010 laying down common rules on air traffic flow management

Note

Manual message

Link	Semantic Value
Term	manual message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

MAN

Definition

[a message] transmitted by IFPS when an incoming message contains errors, indicating that it will be presented to an IFPS operator for manual processing.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Minimum Departure Interval

Link	Semantic Value
Term	Minimum Departure Interval
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

MDI

Definition

A minimum time interval that is required between successive departures on the same Standard Instrument Departure (SID).

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Minimum Turn-round Time

Link	Semantic Value
Term	Minimum Turn-round Time
Status
Mandatory for
Contexts	SESAR
Categories
Synonyms
Related entries	ground handler aircraft operating agency
Broader term
Narrower term

Abbreviation

MTTT

Definition

The minimum turn-round time agreed with an AO/GH (aircraft operator/ground handler) for a specified flight or aircraft type.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010

Note

Lexicon Release

Lexicon Release 2015.2

Minimum time to line-up for take-off

Link	Semantic Value
Term	minimum time to line-up for take-off
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

MINLINEUP

Definition

1. The minimum time required for a flight, which has declared itself ready to depart, to get from its present holding position to airborne.

2. Amount of minutes to be entered in a Ready to depart message REA.

Definition Source

1. EUROCONTROL (2007), EUROCONTROL Specification for ATS Data Exchange Presentation (ADEXP), Ed. 3

2. EUROCONTROL, NM Glossary (2014)

Monitoring Value

Link	Semantic Value
Term	Monitoring Value
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

MV

Definition

The default value at which the load is monitored and is the “action point” for ATCFM activity either by the Network Manager Operations Centre (NMOC) or the FMP.

Definition Source

EUROCONTROL, NM Glossary(2014)

Note

The "red line" in ETFMS and CHMI.

Movement message

Link	Semantic Value
Term	movement message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	aircraft operating agency
Broader term
Narrower term

Abbreviation

MVT

Definition

Standardised IATA format message, sent via SITA to destination airport, AO (aircraft operator) and other recipients, containing departure data of a flight.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010

Note

Network Management Cell

Link	Semantic Value
Term	Network Management Cell
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

NMC

Definition

Part of the Network Manager Operations Centre (NMOC) responsible for the Pre-Tactical ATFCM activities.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Network Operations Division

Link	Semantic Value
Term	Network Operations Division
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

NOD

Definition

A CFMU unit responsible for development and provision of ATFCM, flight planning and airspace data services within the area of responsibility of the CFMU.

Definition Source

EUROCONTROL, Supplement to the CFMU Handbook, ATFCM OPERATING PROCEDURES FOR FMP, Ed. 15 (2011)

Note

Non-sensitive flight

Link	Semantic Value
Term	non-sensitive flight
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Chaotic Situation Management (CHAMAN) sensitive flight
Broader term
Narrower term

Abbreviation

Definition

In terms of Chaotic Situation Management, it is a flight that has a low impact on the network effect.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Operational Reply Message

Link	Semantic Value
Term	Operational Reply Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

ORM

Definition

(a message) used by IFPS to indicate to a message originatorthe status of the processing of a submitted message.

Definition Source

EUROCONTROL (2011), CFMU, IFPS USERS MANUAL, Ed. 15

Note

ORM messages are either MAN, REJ or ACK.

Original Message

Link	Semantic Value
Term	Original Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	ATS Data Exchange Presentation (ADEXP)
Broader term
Narrower term

Abbreviation

ORGMSG

Definition

The ADEXP Title of an erroneous message, as it was received.

Definition Source

EUROCONTROL (2007), EUROCONTROL Specification for ATS Data Exchange Presentation (ADEXP), Ed. 3

Note

Original Route

Link	Semantic Value
Term	Original Route
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	ATS Data Exchange Presentation (ADEXP)
Broader term
Narrower term

Abbreviation

ORGRTE

Definition

Original route between the aerodromes of departure and arrival.

Definition Source

EUROCONTROL (2007), EUROCONTROL Specification for ATS Data Exchange Presentation (ADEXP), Ed. 3

Note

Over-delivery

Link	Semantic Value
Term	over-delivery
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	overload
Broader term
Narrower term

Abbreviation

Definition

An occurrence when the declared rate is exceeded by the actual number of aircraft that enter a regulated sector during a particular period.

Definition Source

EUROCONTROL CFMU, SUPPLEMENT TO THE CFMU HANDBOOK, ATFCM OPERATING PROCEDURES FOR FMP, Edition N°: 4.1, WITH EFFECT FROM 01 JULY 2010

Note

Overload

Link	Semantic Value
Term	overload
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	over-delivery
Broader term
Narrower term

Abbreviation

Definition

An occurrence when an air traffic controller reports that he/she has had to handle more traffic than they consider it was safe to do so.

Definition Source

EUROCONTROL CFMU, SUPPLEMENT TO THE CFMU HANDBOOK, ATFCM OPERATING PROCEDURES FOR FMP, Edition N°: 4.1, WITH EFFECT FROM 01 JULY 2010

Note

Pre-Tactical System

Link	Semantic Value
Term	Pre-Tactical System
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Enhanced Tactical Flow Management System (ETFMS) Flow Management Position Air Traffic Flow and Capacity Management (ATFCM)
Broader term
Narrower term

Abbreviation

PREDICT

Definition

A computer based system, used by Network Operations and Flow Management Positions (FMPs) for Air Traffic Flow and Capacity Management (ATFCM) Pre-Tactical operations. It compares historic demand with forecasted capacities and sector configurations to predict the need for the following day's ATFCM measures. Regulations can be implemented in this system in order to assess their impact before being applied in the Enhanced Tactical Flow Management System (ETFMS).

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Pre-tactical ATFCM

Link	Semantic Value
Term	Pre-tactical ATFCM
Status
Mandatory for	EUROCONTROL
Contexts
Categories
Synonyms
Related entries
Broader term	Air Traffic Flow and Capacity Management
Narrower term

Abbreviation

Definition

action taken [by the CFMU] during the few days before the day of operation [of a flight]. Based on the traffic forecasts, the information received from the Flow Management positions at every ATC centre in Europe and the CFMU statistical data, the ATFM Notification Message (ANM) for the next day is prepared.

Definition Source

EUROCONTROL (2006) CFMU website URL: http://www.cfmu.eurocontrol.int/cfmu/public/standard_page/about_meetobjectives.html

Note

Propose route function

Link	Semantic Value
Term	Propose route function
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

A dynamic route generator available in IFPS, NOP and CIAO (in the AOWIR tool).It provides one or more routes according to a series of conditions such as city-pair, aircraft type, EOBT, etc.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

CIAO - CHMI Interface for Aircraft Operators

Proposed departure slot

Link	Semantic Value
Term	proposed departure slot
Status
Mandatory for
Contexts	EAEA
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

provisional values (values to be confirmed by the AO) of the Calculated Take-Off Time and the Provisional Take-Off Time that could amend the slot already allocated to the flight.

Definition Source

EUROCONTROL/EUROCAE (2006) FLIGHT OBJECT INTEROPERABILITY PROPOSED STANDARD (FOIPS) STUDY, FOIPS D7, Document Reference: FOIPS_MOD-D7-MsWord Issue 1.4 Released

Note

Provisional Take-Off Time

Link	Semantic Value
Term	Provisional Take-Off Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	ATFM departure slot Proposed departure slot
Broader term
Narrower term

Abbreviation

PTOT

Definition

Provisional reference time for an ATFM slot.

Definition Source

EUROCONTROL (2001) EUROCONTROL Standard Document for ATS Data Exchange Presentation (ADEXP) Released Edition 2.0

Note

It remains provisional until 2 hours before EOBT when it is replaced with the CTOT.

Note Source

EUROCONTROL, NM Glossary (2014)

Ready to depart message

Link	Semantic Value
Term	Ready to depart message
Status
Mandatory for
Contexts	EUROCONTROL
Categories
Synonyms
Related entries	Enhanced Tactical Flow Management System (ETFMS) Estimated Off-Block Time (EOBT) Calculated Take-Off Time (CTOT)
Broader term
Narrower term

Abbreviation

REA

Definition

(a message) sent by ATC indicating to ETFMS that a flight can accept an improved CTOT. It can be sent from 15 minutes before EOBT until CTOT.

Definition Source

EUROCONTROL , NM Glossary (2014)

Note

Reference location

{{semantic_table

|term=reference location
|status=
|mandatory=
|synonyms=

|categories=

Regulated Tactical Flight Model

Link	Semantic Value
Term	Regulated Tactical Flight Model
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

RTFM

Definition

A mathematical model containing a point profile and airspace volume profile, created in the Enhanced Tactical Flow Management System (ETFMS) for a flight when Air Traffic Flow and Capacity Management (ATFCM) measures have been applied to the flight. Called Calculated Profile on CHMI.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Regulation cause

{{semantic_table

|term=regulation cause
|status=
|mandatory=
|synonyms=

|categories=

Reject Calculated Take-Off Time

Link	Semantic Value
Term	Reject Calculated Take-Off Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Calculated Take-Off Time (CTOT) Slot Improvement Proposal message (SIP)
Broader term
Narrower term

Abbreviation

REJCTOT

Definition

Rejection of a new CTOT where a Slot Improvement has been proposed by the CFMU.

Definition Source

EUROCONTROL (2011) CFMU, ATFCM USERS MANUAL, Annex 1

Note

A required field in a Slot Improvement Proposal Rejection (SRJ) message.

Reject message

Link	Semantic Value
Term	reject message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Acknowledgement message (ACK) Manual message (MAN)
Broader term	Operational Reply Message (ORM)
Narrower term

Abbreviation

REJ

Definition

[an operational reply message] sent to the originator of a message to indicate that the submitted message could not be processed successfully, either automatically or manually, and that the submitted message has not been accepted and processed by the IFPS.

Definition Source

EUROCONTROL (2011) CFMU, IFPS USERS MANUAL, Ed. 15

Note

Request Flight Plan message

Link	Semantic Value
Term	Request Flight Plan message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Integrated Initial Flight Plan Processing System (IFPS) Reject message (REJ) Request Supplementary Flight Plan Message (RQS)
Broader term
Narrower term

Abbreviation

RQP

Definition

A message sent by an ATS (Air Traffic Services) Unit, or an Aircraft Operator, to both IFPS units, when they need a copy of the Flight Plan. IFPS will reply to the originator of an RQP either by sending the Flight plan message or a REJ message with an error indicating that there is no Flight Plan matching the query.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Request For Improvement status

Link	Semantic Value
Term	Request For Improvement status
Status
Mandatory for
Contexts
Categories
Synonyms	RFI status
Related entries
Broader term
Narrower term

Abbreviation

Definition

The (default) readiness status of a flight, which is prepared to unconditionally accept any improvements in its Calculated Take-Off Time (CTOT), via a Slot Revision Message (SRM).

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Request Supplementary Flight Plan Message

Link	Semantic Value
Term	Request Supplementary Flight Plan Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Request Flight Plan message (RQP) Integrated Initial Flight Plan Processing System (IFPS) Supplementary flight plan message (SPL)
Broader term
Narrower term

Abbreviation

RQS

Definition

A message sent by an ATS (Air Traffic Services) Unit to both IFPS units when they need information contained in the flight plan form (Field 19), but not transmitted in the filed flight plan message. IFPS will reply either by sending a SPL (Supplementary flight plan) message, or, a plain text message explaining that no supplementary information is recorded on the flight plan form.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Request for direct improvement message

Link	Semantic Value
Term	Request for direct improvement message
Status
Mandatory for
Contexts
Categories
Synonyms	Request for improvement message
Related entries	Request For Improvement status
Broader term
Narrower term

Abbreviation

RFI

Definition

A message sent by Aircraft Operators in order to change the flight readiness from Slot Improvement Proposal Wanted (SWM) status to Request For (direct) Improvement status.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Rerouteing

Link	Semantic Value
Term	Rerouteing
Status
Mandatory for
Contexts
Categories
Synonyms	alternative spelling:rerouting
Related entries
Broader term
Narrower term

Abbreviation

Definition

(for ATFCM purposes) An ATFCM measure which requires an aircraft operator to file an alternate route/flight level in order to resolve ATC capacity problems and minimise delays.

Definition Source

EUROCONTROL, Supplement to the CFMU Handbook, ATFCM OPERATING PROCEDURES FOR FMP, Ed. 15 (2011)

Note

Rerouteing Proposal message

Link	Semantic Value
Term	Rerouteing Proposal message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

RRP

Definition

a message sent to an aircraft operator (AO) to offer a different CTOT or to avoid the need for a slot on a new route.

Definition Source

EUROCONTROL (2011) CFMU, ATFCM USERS MANUAL, Ed. 15

Note

Respond by

Link	Semantic Value
Term	Respond by
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Enhanced Tactical Flow Management System (ETFMS) Slot Improvement Proposal message (SIP)
Broader term
Narrower term

Abbreviation

RESPBY

Definition

Latest time by which a response to a Slot Improvement Proposal message (SIP) or other message must be received in the Enhanced Tactical Flow Management System (ETFMS).

Definition Source

EUROCONTROL (2011) CFMU Glossary, Sept. 2011

Note

Response scheme

Link	Semantic Value
Term	response scheme
Status
Mandatory for
Contexts	EAEA
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

pre-defined scenarios, procedures and associated measures to be implemented in order to react to critical events.

Definition Source

EUROCONTROL (2004) Air Traffic Flow&Capacity Management Evolution Plan for the ECAC States

Note

Route Availability Document

Link	Semantic Value
Term	Route Availability Document
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

RAD

Definition

a sole-source-planning document that combines Aeronautical Information Publication (AIP) Route Flow Restrictions with Air Traffic Flow & Capacity Management (ATFCM) routeing requirements designed to make the most effective use of Air Traffic Control (ATC) capacity.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

The RAD is finalised during the ATFCM strategic planning process.

Route Catalogue

Link	Semantic Value
Term	Route Catalogue
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Aircraft Operator What-If-Reroute (AOWIR)
Broader term
Narrower term

Abbreviation

RCAT

Definition

a database, maintained by the the Network Manager Operations Centre (NMOC), which contains the routes that can be accessed by the CFMU What-If-Rerouteing functions.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Routing area

Link	Semantic Value
Term	routing area
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

An area that encompasses one or more major traffic flows, defined for the purpose of developing a detailed plan for the implementation of ATM systems and procedures.

Definition Source

ICAO, CARIBBEAN/SOUTH AMERICAN AIR TRAFFIC FLOW MANAGEMENT MANUAL (CAR/SAM ATFM MANUAL), Version 1.1 (2010)

Note

Scheduled Off-Block Time

Link	Semantic Value
Term	Scheduled Off-Block Time
Status
Mandatory for
Contexts	SESAR
Categories
Synonyms
Related entries	Actual Off-Block Time Estimated Off-Block Time Scheduled In-Block Time
Broader term
Narrower term

Abbreviation

SOBT

Definition

The time that an aircraft is scheduled to depart from its parking position.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1., July 2010

Note

Lexicon Release

Lexicon Release 2015.2

Scheduled Turn-round Time

Link	Semantic Value
Term	Scheduled Turn-round Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

STTT

Definition

Metric SOBT - SIBT (Scheduled Off-Block Time - Scheduled In-Block Time)

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010

Note

Sensitive flight

Link	Semantic Value
Term	sensitive flight
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	non-sensitive flight Chaotic Situation Management
Broader term
Narrower term

Abbreviation

Definition

In terms of Chaotic Situation Management, it is a flight that has a high impact on the network effect.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Simulation expeditor

Link	Semantic Value
Term	Simulation expeditor
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

SIMEX

Definition

A simulation tool which is used in Tactical, Pre-tactical and Strategic ATFCM operations. Its functionality is different depending upon which area it is to be used. It enables Network Operations staff to test and fine tune the application, modification or cancellation of ATFCM measures or restrictions before applying them to live traffic or to a new airspace structure.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Slot

Link	Semantic Value
Term	slot
Status
Mandatory for
Contexts	EAEA
Categories
Synonyms
Related entries
Broader term
Narrower term	ATFM departure slot Airport Arrival Slot Airport Departure Slot Slot Allocation Message Slot Revision Message Slot Cancellation message

Abbreviation

Definition

a Calculated Take-Off Time (CTOT) that the Aircraft Operator should comply with and a time window around the CTOT in which the aircraft has to take-off. This time window is used for sequencing departure flights.

Definition Source

EUROCONTROL/EUROCAE (2006) FLIGHT OBJECT INTEROPERABILITY PROPOSED STANDARD (FOIPS) STUDY, FOIPS D7, Document Reference: FOIPS_MOD-D7-MsWord Issue 1.4 Released

Note

Slot Allocation Message

Link	Semantic Value
Term	Slot Allocation Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

SAM

Definition

A message giving a Calculated Take-Off Time (CTOT) sent by the Computer-Assisted Slot Allocation (CASA) system of the Enhanced Tactical Flow Management System (ETFMS) to the operators of regulated flights a maximum of two hours before the Estimated Off-Block Time (EOBT).

Definition Source

EUROCONTROL, NM glossary (2014)

Slot Cancellation message

Link	Semantic Value
Term	Slot Cancellation message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

SLC

Definition

Standard message from CFMU (Central Flow Management Unit) sent when flight regulations are canceled.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1., July 2010

Note

Slot Improvement Proposal Acceptance message

Link	Semantic Value
Term	Slot Improvement Proposal Acceptance message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Improvement Proposal message (SIP) Calculated Take-Off Time (CTOT) Slot Improvement Proposal Rejection message (SRJ)
Broader term
Narrower term

Abbreviation

SPA

Definition

a message sent by an Aircraft Operator for a flight which has received a Slot Improvement Proposal (SIP). It is used to inform ETFMS that the proposed improved Calculated Take-Off Time (CTOT) is acceptable.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Slot Improvement Proposal Rejection message

Link	Semantic Value
Term	Slot Improvement Proposal Rejection message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Improvement Proposal message (SIP) Calculated Take-Off Time (CTOT)
Broader term
Narrower term

Abbreviation

SRJ

Definition

a message sent by an Aircraft Operator for a flight having received a Slot Improvement Proposal (SIP) message. It is used to inform the ETFMS that the proposed improved Calculated Take-Off Time (CTOT) has been rejected. Thus the flight then keeps its original CTOT.

Definition Source

EUROCONTROL, NM Glossary (2014)

Note

Slot Improvement Proposal Wanted Message

Link	Semantic Value
Term	Slot Improvement Proposal Wanted Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Request for direct improvement message (RFI)
Broader term
Narrower term

Abbreviation

SWM

Definition

A message sent by Aircraft Operators in order to change the flight readiness status from Request For Improvement (RFI) status to Slot Improvement Wanted status.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Slot Improvement Proposal Wanted status

{{semantic_table

|term=Slot Improvement Proposal Wanted status
|status=
|mandatory=
|synonyms=SWM status, SIP Wanted status

|categories=

Slot Improvement Proposal message

Link	Semantic Value
Term	Slot Improvement Proposal message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Improvement Proposal Wanted status Calculated Take-Off Time (CTOT)
Broader term
Narrower term

Abbreviation

SIP

Definition

A message sent to a flight in Slot Improvement Proposal Wanted status. It proposes a new and improved Calculated Take-Off Time (CTOT), which may then be accepted or rejected by the Aircraft Operator.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Slot Issue Time

Link	Semantic Value
Term	Slot Issue Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Allocation Message (SAM)
Broader term
Narrower term	Slot Issue Time 1 Slot Issue Time 2

Abbreviation

SIT

Definition

The time at which the Network Manager issues the Slot Allocation Message to the aircraft operator and ATC at the aerodrome of departure.

Definition Source

EUROCONTROL, CFMU, ATFCM USERS MANUAL, Annex 8, Ed. 15

Note

Slot Issue Time 1

Link	Semantic Value
Term	Slot Issue Time 1
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Slot Issue Time (SIT)
Narrower term

Abbreviation

SIT 1

Definition

2 hours before the EOBT of a flight, the slot is sent to the aircraft operator and ATC. This time is called SIT1.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Slot Issue Time 2

Link	Semantic Value
Term	Slot Issue Time 2
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Slot Issue Time (SIT)
Narrower term

Abbreviation

SIT 2

Definition

The slot may be improved through the True Revision Process up to when the clock reaches a certain parameter before CTOT depending on the readiness status (SWM/RFI/REA) of the flight. This time is called SIT2.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Slot Missed Message

Link	Semantic Value
Term	Slot Missed Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Allocation Message (SAM) Estimated Off-Block Time (EOBT)
Broader term
Narrower term

Abbreviation

SMM

Definition

a message originated by an aircraft operator when a slot time given in the Slot Allocation Message (SAM) cannot be achieved but where a new EOBT cannot be supplied.

Definition Source

EUROCONTROL, ATFCM USERS MANUAL, Ed. 15 (2011) [8]

Note

Slot Reference Time

Link	Semantic Value
Term	Slot Reference Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Computer-Assisted Slot Allocation (CASA)
Broader term
Narrower term

Abbreviation

SRT

Definition

The result of an operation performed by the Computer-Assisted Slot Allocation (CASA) system, that builds for each regulated Traffic Volume a list of slots according to the given rate per hour. CASA divides the number of minutes in an hour by the regulation rate (example: when the rate is 30/60, the slots will be every 2 minutes, i.e. 00, 02, 04, 06 etc).

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Slot Revision Message

Link	Semantic Value
Term	Slot Revision Message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Cancellation message Slot Allocation Message
Broader term
Narrower term

Abbreviation

SRM

Definition

1.Standard message from CFMU (Central Flow Management Unit) sent when flight regulations are revised.

2. A message sent by the Computer-Assisted Slot Allocation (CASA) system, giving a New Calculated Take-Off Time (NEWCTOT). It replaces the previous CTOT and shows either an earlier or later time, or the same time but a different most penalising Regulation.

Definition Source

1. EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010

2. EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Slot Tolerance Window

Link	Semantic Value
Term	Slot Tolerance Window
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Departure Tolerance Window (DTW)
Broader term
Narrower term

Abbreviation

STW

Definition

Time window around the CTOT in which a flight should be taking off. By default 5 minutes before and 10 minutes after CTOT. This value can be updated in ETFMS.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

ETFMS uses a Slot Tolerance Window (STW) for regulated flights and a Departure Tolerance Window (DTW) for non regulated flights. These windows are used for the production of statistics and for the processing of DPI messages.

Note Source

EUROCONTROL (2011) CFMU, DPI Implementation Guide

Slot adherence

Link	Semantic Value
Term	slot adherence
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Calculated Take-Off Time (CTOT)
Broader term	slot
Narrower term

Abbreviation

Definition

Compliance with a CTOT by the aircraft operator and ATC.

Definition Source

EUROCONTROL, Supplement to the CFMU Handbook, ATFCM OPERATING PROCEDURES FOR FMP, Ed. 15 (2011)

Note

Slot allocation

Link	Semantic Value
Term	slot allocation
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Allocation Message (SAM) Computer-Assisted Slot Allocation (CASA)
Broader term	slot
Narrower term

Abbreviation

Definition

An ATFCM measure implemented by means of a departure slot in order to balance traffic demand against available ATC capacity.

Definition Source

EUROCONTROL, Supplement to the CFMU Handbook, ATFCM OPERATING PROCEDURES FOR FMP, Ed. 15 (2011)

Note

Stack swapping

Link	Semantic Value
Term	Stack swapping
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

A non-ATFCM measure used by some Flow Management Positions (FMP) to reduce the impact of an expected high traffic load at one Initial Approach Fix (IAF) of an airport having multiple IAFs. It involves airborne traffic being tactically re-routed away from the IAF expecting the high load, to another IAF for the same airport, which anticipates a lower loading.

Definition Source

EUROCONTROL,CFMU Glossary, Sept. 2011

Note

Supplementary flight plan message

Link	Semantic Value
Term	Supplementary Flight Plan message
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

SPL

Definition

A message sent by IFPS, as a reply to a RQS (Request Supplementary Flight Plan Message), including the Field 19 information contained in the flight plan form, but not transmitted with the flight plan message.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Tactical Network Coordinator

Link	Semantic Value
Term	Tactical Network Coordinator
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

TNC

Definition

a position in the CFMU operations room that monitors the overall tactical Air Traffic Flow and Capacity Management (ATFCM) situation to ensure the pan-European compatibility of ATFCM measures. Predecessor of the TNM position.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Tactical improvement route

Link	Semantic Value
Term	tactical improvement route
Status
Mandatory for
Contexts	EAEA
Categories
Synonyms
Related entries	Air Traffic Flow Management (ATFM)
Broader term
Narrower term

Abbreviation

Definition

A Tactical route proposed by the ATFM.

Definition Source

EUROCONTROL/EUROCAE (2006) FLIGHT OBJECT INTEROPERABILITY PROPOSED STANDARD (FOIPS) STUDY, FOIPS D7, Document Reference: FOIPS_MOD-D7-MsWord Issue 1.4 Released

Note

Target Landing Time

Link	Semantic Value
Term	Target Landing Time
Status
Mandatory for
Contexts	SESAR
Categories
Synonyms
Related entries	Estimated Landing Time
Broader term
Narrower term

Abbreviation

TLDT

Definition

Targeted Time from the Arrival management process at the threshold, taking runway sequence and constraints into account. It is not a constraint but a progressively refined planning time used to coordinate between arrival and departure management processes.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010

Note

Each TLDT on one runway is separated from other TLDT or TTOT to represent vortex and/or SID separation between aircraft.

Lexicon Release

Lexicon Release 2015.2

Target-DPI

Link	Semantic Value
Term	Target-DPI
Status
Mandatory for
Contexts
Categories
Synonyms	Target - departure planning information message
Related entries	Target Take-Off Time (TTOT)
Broader term	departure planning information (DPI)
Narrower term

Abbreviation

T-DPI

Definition

"DPI message (...) sent from the CDM-Airport to the CFMU (ETFMS) notifying the Target Take Off Time (TTOT)"

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, issue 3.1, July 2010

Note

T-DPI subtypes are:

T-DPI-p (Target DPI - Provisional)

T-DPI-c (Target DPI - Confirmed)

T-DPI-s (Target DPI - Sequenced)

Note Source

EUROCONTROL, CFMU (2010) CFMU website on "The Departure Planning Information (DPI) message" [9]

Time to Insert into Sequence

Link	Semantic Value
Term	Time to Insert into Sequence
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Ready to depart message (REA)
Broader term
Narrower term

Abbreviation

TIS

Definition

A parameter that prevents an improvement into an already organised departure sequence. It may be adjusted at any time depending on the local aerodrome traffic situation and may vary during the day. The TIS parameter is not relevant when ATC has sent an REA message for a flight.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Time to Remove from Sequence

Link	Semantic Value
Term	Time to Remove from Sequence
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

TRS

Definition

A parameter that prevents a change to a later CTOT when the flight is already in the departure sequence. It may be adjusted at any time depending on the local aerodrome traffic situation and may vary during the day.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Total Estimated Elapsed Time

Link	Semantic Value
Term	Total Estimated Elapsed Time
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
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

Traffic load

{{semantic_table

|term=traffic load
|status=
|mandatory=
|synonyms=

|categories=

Traffic volume

{{semantic_table

|term=Traffic volume
|status=
|mandatory=
|synonyms=

|categories=

Traffic volume set

Link	Semantic Value
Term	traffic volume set
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Traffic volume
Narrower term

Abbreviation

Definition

A set of Traffic volumes relating to a single Flow Management Position (FMP).

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

True Revision Process

Link	Semantic Value
Term	True Revision Process
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries	Slot Issue Time 2 (SIT 2)
Broader term
Narrower term

Abbreviation

TRP

Definition

the automatic mechanism that routinely attempts to improve the slot of allocated flights; for a given flight, the true revision process takes place after the Slot Allocation Message has been issued until a time parameter before the CTOT.

Definition Source

EUROCONTROL, Directorate Network Management, BASIC CFMU HANDBOOK, GENERAL & CFMU SYSTEMS, Ed. 15 (2011)

Note

Variable Taxi Time

Link	Semantic Value
Term	Variable Taxi Time
Status
Mandatory for
Contexts	SESAR
Categories
Synonyms
Related entries	Estimated Taxi-In Time (EXIT) Estimated Taxi-Out Time (EXOT)
Broader term
Narrower term

Abbreviation

VTT

Definition

the estimated time that an aircraft spends taxiing between its parking stand and the runway or vice versa.

Variable Taxi Time is the common name for inbound (EXIT) and outbound (EXOT) taxi times, used for calculation of TTOT or TSAT.

Definition Source

EUROCONTROL, ACI, IATA (2010) Airport CDM Implementation Manual, Issue 3.1. July 2010

Note

Inbound taxi time (EXIT) includes runway occupancy and ground movement time, whereas outbound taxi time (EXOT) includes push back & start up time, ground movement, remote or apron de-icing, and runway holding times.

Lexicon Release

Lexicon Release 2015.2

Volume of air traffic

Link	Semantic Value
Term	volume of air traffic
Status
Mandatory for
Contexts
Categories
Synonyms	air traffic volume
Related entries
Broader term
Narrower term

Abbreviation

Definition

[for ATFCM purposes] The number of aircraft within a defined airspace or aircraft movements at an aerodrome, within a specified period of time.

Definition Source

EUROCONTROL, Supplement to the CFMU Handbook, ATFCM OPERATING PROCEDURES FOR FMP, Ed. 15 (2011)

Note

YO – YO regulations

Link	Semantic Value
Term	YO – YO regulations
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term
Narrower term

Abbreviation

Definition

Regulations to prevent flight plan filing of abnormal flight profiles into and over specified Air Traffic Control (ATC) sectors.

Definition Source

EUROCONTROL, CFMU Glossary, Sept. 2011

Note

Link	Semantic Value
Term	ATFCM Daily Plan
Status
Mandatory for
Contexts
Categories
Synonyms
Related entries
Broader term	Air Traffic Flow and Capacity Management (ATFCM)
Narrower term