Acronyms

The list of acronyms is available for download.

Acronym	Definition	Explanation
AA	“ATC Activated”, Actual Airborne	FUM status
AAI	Airport Authority Interface
a/c	Aircraft
ACARS	Aircraft Communications Addressing and Reporting System
ACC	Area Control Centre
A-CDM	Airport Collaborative Decision Making
ACIS	Airport CDM Information Sharing
ACISP	Airport CDM Information Sharing Platform
ACH	ATC flight plan Change Message
ACK	Acknowledgement message
ACZT	Actual Commencement of De-icing Time	The time when de-icing operations on an aircraft starts
ADB	Actual Deicing Begin	A-CDM@FRA process status
ADE	Actual Deicing End	A-CDM@FRA process status
ADEP	Aerodrome of Departure
ADES	Aerodrome of Destination
ADEXP	ATS Data Exchange Presentation	ADEXP provides a format for use primarily in on-line, computer to computer message exchange. ADEXP is a format, not a protocol.
ADIT	Actual De-icing Time	Metric AEZT – ACZT
ADP	ATC-DPI sended to NMOC	A-CDM@FRA process status
A-DPI	ATC-Departure Planning Information message	DPI message sent by the CDM Airport to the NMOC (ETFMS) notifying the TTOT between ATC time of pre-departure sequencing and ATOT
AEBT	Actual End Boarding Time	End of Boarding process
AEGT	Actual End of Ground handling Time	The time when ground handling on an aircraft ends, can be equal to ARDT (TBD locally)
AEZT	Actual End of De-icing Time	The time when de-icing operations on an aircraft end
AFTN	Aeronautical Fixed Telecommunication Network
AGHT	Actual Ground Handling Time	The total duration of the ground handling of the aircraft. Metric ACGT - AEGT
AIBT	Actual In-Block Time	The time that an aircraft arrives in-blocks. (Equivalent to Airline/Handler ATA –Actual Time of Arrival, ACARS = IN).
AIP	Aeronautical Information Puplication
ALDT	Actual Landing Time	The time that an aircraft lands on a runway. (Equivalent to ATC ATA –Actual Time of Arrival = landing, ACARS=ON).
ALU	Lining Up	A-CDM@FRA process status
ALUT	Actual Line Up Time	The time that an aircraft receives its line up clearance.
AMAN	Arrival Manager	An arrival flow management tool that optimises the traffic flow nto a TMA and/or runway(s) by calculating TLDT (Target LanDing Time) taking various constraints and preferences into account
ANSP	Air Navigation Service Provider	An organisation responsible for management of flight traffic on behalf of a company, region or country.
AO	Aircraft Operator	A person, organisation or enterprise en aged in or offering to engage in an aircraft operation. (ICAO Doc 4444, Chapter 1)
AOBT	Actual Off-Block Time	Time the aircraft pushes back / vacates the parking position. (Equivalent to Airline / Handlers ATD – Actual Time of Departure & ACARS=OUT)
AOC	Airport Operator Committee
AODB	Airport Operational Data Base	System INFOplus
AORT	Actual Off-Block Request Time
AOT	Automatically generated TOBT	A-CDM@FRA process status
APR	Apron Responsibility	Aircraft in the responsibility of Frankfurt Apron.
ARCID	Aircraft Identification
ARCTYP	Aircraft Type
ARDT	Actual Ready Time (for Movement)	When the aircraft is ready for start up/push back or taxi immediately after clearance delivery, meeting the requirements set by the TOBT definition.
ARR	Arrival	Inbound flight
ARZT	Actual Ready for De-icing Time	The time when the aircraft is ready to be de-iced
ASAT	Actual Start Up Approval Time	Time that an aircraft receives its start up approval. Note: the moment the start up approval is given can be in advance of the TSAT
ASBT	Actual Start Boarding Time	Time passengers are entering the bridge or bus to the aircraft
ASGT	Actual Start Gate Time	Begin of Gate handling
A-SMGCS	Advanced Surface Movement Guidance and Control System	System at airports having a surveillance infrastructure consisting of a Non-Cooperative Surveillance (e.g. SMR, Microwave Sensors, Optical Sensors etc) and Cooperative Surveillance (e.g. Multi-lateration systems)
ASRT	Actual Start Up Request Time	Time the pilot requests start up clearance.
ATBT	Actual Taxi Begin Time
ATC	Air Traffic Control	Service provided by ground-based controllers who direct aircraft on the ground and in the air. This to separate, organise and expedite the flow of air traffic.
ATDF	Actual Time over Departure Fix
ATFCM	Air Traffic Flow and Capacity Management	ATFM extended to the optimisation of traffic patterns and capacity management. Through managing the balance of capacity and demand the aim of ATFCM is to enable flight punctuality and efficiency according to the available resources with the emphasis on optimising the network capacity through Collaborative DecisionMaking process. (NMOC Handbook TFCM_Operating_Procedures_for_FMP_1.0)
ATFM	Air Traffic Flow Management	A service established with the objective of contributing to a safe, orderly and expeditious flow of air traffic by ensuring that air traffic control capacity is utilised to the maximum extent possible, and that the traffic volume is compatible with the capacities declared by the appropriate Air Traffic Services authority (ICAO Annex 11, Chapter 1)
ATM	Air Traffic Management	Management of the demand for, and the use of airspace
ATOF	Actual Time over Departure Fix
ATOT	Actual Take Off Time	The time that an aircraft takes off from the runway. (Equivalent to ATC ATD–Actual Time of Departure, ACARS = OFF).
ATS	Air Traffic Services	The service provided by Air Traffic Controllers working at airports for the arrival and departure flight phases and in Air Traffic Control Centres for the en route flight phase
ATSP	Air Traffic Service Provider
ATTT	Actual Turn-round Time	Metric AOBT – AIBT
AVDGS	Automatic Visual Docking Guidance System	Ramp Display
AXIT	Actual Taxi-In Time	Metric AIBT – ALDT
AXOT	Actual Taxi-Out Time	Metric ATOT – AOBT

Acronym	Definition	Explanation
BA	Betriebsanweisung Fraport
BAFVK	Betriebsanweisung Flugverkehrskontrolle
BAO	Betriebsanordnung ATC
BEST	BEtriebSTeuerung	Handling System of Lufthansa
BGB	Begin of Boarding	A-CDM@FRA process status
BGT	Begin of Gate Handling	A-CDM@FRA process status

Acronym	Definition	Explanation
CBA	Cost-Benefit Analysis	A formal discipline used to help appraise, or assess, the case for a project or proposal. This is achieved by weighing the total expected costs against the total expected benefits of one or more actions in order to choose the best or most profitable option.
CDAC	CDM in Adverse Conditions
CDB	Central Data Base
CDM	Collaborative Decision Making
CDM AIRPORT	CDM Airport	An airport is considered as a CDM AIRPORT when the Airport CDM Information Sharing, Turn-round process (Milestones Approach) and Variable Taxi Time Calculation Elements are applied at the Airport
CDP	C-DPI sended to NMOC	A-CDM@FRA process status
C-DPI	Cancel – Departure Planning Information message	This message informs the NMOC that previously sent DPI is no longer valid.
CFMU	(now called NMOC)
CHG	Modification message	Standard message sent to NMOC to change flight plan data.
CLR	Flightplan in clearing process	A-CDM@FRA process status
CNL	Flight Plan Cancellation	Standard message sent to NMOC to cancel flight plan.
COFU	Collaborative Management of Flight Updates
CPDS	Collaborative Pre-Departure Sequence
CSA	Common Situational Awareness
CSA-Tool	System to Input TOBT for AO/GH
CTOT	Calculated Take Off Time	A time calculated and issued by the appropriate Central Management unit, as a result of tactical slot allocation, at which a flight is expected to become airborne. (ICAO Doc7030/4 – EUR, Table 7)
CTRP	CDM Turn-Round Process

Acronym	Definition	Explanation
DAS-FRA	Datenaustauschsystem	System of Lufthansa for internal and external (e.g. Fraport) data exchange
DCL	Departure Clearance (Data link)
DCR	Deicing Company Ready	A-CDM@FRA process status
DCS	Departure Control System
DEP	Departure	Outbound flight.
DES	De-suspension message
DFS	Deutsche Flugsicherung GmbH	German ATC Provider
DGA	Digitale Gateansage	Self explaining
DGS	Docking Guidance System
DIR	Deicing Requested	A-CDM@FRA process status
DIV	Diverted	A-CDM@FRA process status
DLA	Delay message	Standard message sent to NMOC to delay flight plan OBT.
DMAN	Departure Manager	DMAN is a planning system to improve the departure flows at an airport by calculating the Target Take Off Time (TTOT) and Target Start up Approval Time (TSAT) for each flight, taking multiple constraints and preferences into account.
DOP	(Bridge-) Driver on Position	A-CDM@FRA process status
DPD	De-icing Pad	De-icing pad or other area on the apron for the use of de-icing
DPI	Departure Planning Information message	Message from Airport to NMOC. See also A-DPI, C-DPI, E-DPI, T-DPI
DVA	Deicing Vehicle allocated	A-CDM@FRA process status
DVP	Deicing Vehicle on position	A-CDM@FRA process status

Acronym	Definition	Explanation
ECZT	Estimated Commencement of De-icing Time	The estimated time when de-icing operations on an aircraft are expected to start.
EDDF	Airport Frankfurt Main	ICAO Location Indicator
EDIT	Estimated De-icing Time	Metric EEZT – ECZT.
EDP	E-DPI sended to NMOC	A-CDM@FRA process status
E-DPI	Early – Departure Planning Information message	First DPI message is sent from -3 hrs and before the T-DPI message by the CDM AIRPORT to the NMOC (ETFMS) notifying the ETOT. Also first DPI sent after ATC flight plan Cancellation.
EET	Estimated Elapsed Time	The estimated time required to proceed from one significant point to another (ICAO).
EEZT	Estimated End of De-icing Time	The estimated time when de-icing operations on an aircraft are expected to end.
EFD	Eurocontrol Flight Data Message	Delivers the data for the FUM which is established in Stanly_CDM
EGT	End of Gate Handling	A-CDM@FRA process status
EIBT	Estimated In-Block Time	The estimated time that an aircraft will arrive in-blocks. (Equivalent to Airline/Handler ETA–Estimated Time of Arrival).
ELDT	Estimated Landing Time	The estimated time that an aircraft will touch down on the runway. (Equivalent to ATC ETA–Estimated Time of Arrival = landing).
ENB	End of Boarding	A-CDM@FRA process status
EOBD	Estimated Off-Block Date	The estimated date at which the aircraft will commence movement associated with departure (ICAO).
EOBT	Estimated Off-Block Time	The estimated time at which the aircraft will start movement associated with departure(ICAO).
ERR	Error Message
ERZT	Estimated Ready for De-icing Time	The estimated time when the aircraft is ex pected to be ready for de-icing operations
ETDF	Estimated Time over Departure Fix
ETFMS	Enhanced Tactical Flow Management System	ETFMS receives radar derived data provided by the Air Navigation Service Providers(ANSPs), position report data provided by the Aircraft Operators and meteorological data. ETFMS uses this data to update the existing data coming from flight plans and flow measures.
ETOF	Estimated Time over Fix
ETOT	Estimated Take Off Time	The estimated take off time taking into account the EOBT plus EXOT.
ETTT	Estimated Turn-round Time	The time estimated by the AO/GH on the day of operation to turn-round a flight taking into account the operational constraints.
Eurocat-C	System zur Luftlagedarstellung
EXIT	Estimated Taxi-In Time	The estimated taxi time between landing and in-block.
EXOT	Estimated Taxi-Out Time	The estimated taxi time between off-block and take off. This estimate includes any delay buffer time at the holding point or remote de-icing prior to take off.

Acronym	Definition	Explanation
FBO	Flughafenbenutzungsordnung	Airport User Regulation
FDPS	Flight Data Processing System	Fraport system used for Airside Operations
FFU	Flugfunktion	Fraport Flugdatenattribut (Flight data attributes)
FG	Functional Group
FIDS	Flight Information Display System
FIR	Flight Information Region
FLS	Flight Suspension message	Standard message sent from NMOC to suspend flight plan OBT
FLT	Flight
FMP	Flow Management Position	Provides a vital flow of information from their operational ATC Unit to the NMOC about the current situation within their ACC and the operational situation at the airport.
FPL	Filed Flight Plan	ICAO derived flight plan
FRA	Frankfurt Airport	IATA 3 Letter Code
FRD	Functional Requirements Document	This document specifies the minimum set of requirements to implement Airport CDM
FSA	First System Activation
FUM	Flight Update Message	A message sent from the NMOC to a CDM Airport providing an ELDT, ETO and flight level at the last point of route.

Acronym	Definition	Explanation
GAT	General Air Traffic
GAT	General Aviation Terminal
GH	Ground Handler	Company responsible for handling of aircraft during turn-round at the airport.
GHD	Ground Handler Responsibility	Aircraft in the responsibility of ground handler (between On-Block and Off-Block)
GHE	Groundhandling End	A-CDM@FRA process status

Acronym	Definition	Explanation
ICAO	International Civil Aviation Organisation
ICP	Deicing on Stand	A-CDM@FRA process status
ICR	Deicing on pad	A-CDM@FRA process status
IDF-List	Inactiv departure flight-List	Internal list of FDPS system
IFPS	Integrated Initial Flight Plan Processing System	A system of the NMOC designed to rationalize the reception, initial processing and distribution of IFR/GAT flight plan data related to IFR flight within the area covered by the participating States. (ICAO Doc 7030/4 – EUR, paragraph 3.1.1 new)
IFR	Instrument Flight Rules

Acronym	Definition	Explanation
MACS	Multi Access Control System	System for the use of gate and boarding handling
MAP	Missed Approach	A-CDM@FRA process status
MDI	Minimum Departure Interval
MOT	Manually entered TOBT	A-CDM@FRA process status
MoU	Memorandum of Understanding
MST	Milestone
MTTT	Minimum Turn-round Time	The minimum turn-round time agreed with an AO/GH for a specified flight or aircraft type.
MVT	Movement message	Standardized IATA format message, sent via SITA to destination airport, AO and other recipients, containing departure data of a flight

Acronym	Definition	Explanation
NOI	Deicing cancelled (no Deicing)	A-CDM@FRA process status
NMOC	Network Manager Operations Centre (formerly known as CFMU)	Network Manager Operations Centre (NMOC), Brussels – A Central Management Unit operated by EUROCONTROL. (ICAO Doc7754, Volume I, Part V.III, paragraph 3)

Acronym	Definition	Explanation
OAT	Operational Air Traffic
OBR	Off-Block Request	A-CDM@FRA process status
OCD	Operational Concept Document
OFB	Off-Block	A-CDM@FRA process status
OFR	Off-Block for Remote Holding	A-CDM@FRA process status
ONB	On Block	A-CDM@FRA process status
ORGN	Originator

Acronym	Definition	Explanation
RDY	Aircraft Ready	A-CDM@FRA process status
REA	Ready message
REG	Aircraft Registration
REJ	Rejection message
RFO	Remote Off Block	A-CDM@FRA process status
RFP	Replacement Flight Plan
RIBT	Remote In-Block Time	The time that an aircraft arrives at its parking position for remote holding.
RMH	Remote Holding
RMS	Ressource Management System	Fraport Ressource Management System for allocation of Positions and Gates
RNB	Remote On Block	A-CDM@FRA process status
ROBT	Remote Off-Block Time	The time that an aircraft leaves its parking position for remote holding.
RPL	Repetitive ATC flight plan
RTOT	Requested Take Off Time	Time the AO wants to depart (TOBT + EXOT)
RTS	Return to Stand
RWY	Runway

Acronym	Definition	Explanation
SAM	Slot Allocation Message
SBY	Standby	A-CDM@FRA process status
SCZT	Sequenced Commencement of Deicing Time	Time calculated by sequencer system
SEQ	Sequenced	A-CDM@FRA process status
SES	S-East-Sierra Verfahren
SGT	Standard Ground Time
SIBT	Scheduled In-Block Time	The time that an aircraft is scheduled to arrive at its parking position.
SID	Standard Instrument Departure	Published flight procedures followed by aircraft on an IFR flight plan immediately after take off from an airport.
SIT1	NMOC Slot Issue Time	The time when the NMOC issues the SAM(Slot Allocation Message). This is normally two hours before EOBT.
SITA	Société Internationale de Télécommunication Aéronautique
SLA	Service Level Agreement
SLC	Slot Cancellation message	Standard message from NMOC sent when flight regulations are canceled
SMS	Short Message Service	Via Cellphone
SOBT	Scheduled Off-Block Time	The time that an aircraft is scheduled to depart from its parking position.
SRE	Sammelraum	Fraport Data for Gate
SRM	Slot Revision Message	Standard message from NMOC sent when flight regulations are revised
SSR	Secondary Surveillance Radar
STAR	Standard Arrival Route
STD	Scheduled Time of Departure
STOT	Sequenced Take Off Time	Time calculated by sequencer system
STTT	Scheduled Turn-round Time	Metric SOBT - SIBT
STW	Slot Tolerance Window	CTOT –5 / +10 minutes
SUG	Start Up Given	A-CDM@FRA process status
SUR	Start Up Request	A-CDM@FRA process status

Acronym	Definition	Explanation
TBD	To Be Defined
TDP	Target DPI sended to NMOC	A-CDM@FRA process status
T-DPI	Target - Departure Planning Information message	This DPI message is sent from the CDM Airport to the NMOC (ETFMS) notifying the Target Take Off Time (TTOT).
TE	Terminated	FUM status
TFDPS	Tower Flight Data Processing System	Operational Tower system
TFO	Take Off from outstation	A-CDM@FRA process status
TIBT	Target In-Block Time
TLDT	Target Landing Time	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. Each TLDT on one runway is separated from other TLDT or TTOT to represent vortex and/ or SID separation between aircraft.
TMA	Terminal Manoeuvring Area
TMI	Thirty Minutes Inbound	The time at which the DFS-AMAN delivers ARCID, ARCTYP and ELDT to the Fraport-FDPS
TMO	Ten Minutes Out	A-CDM@FRA process status (ELDT – 10min)
TOBT	Target Off-Block Time	The time that an Aircraft Operator or Ground Handler estimates that an aircraft will be ready, all doors closed, boarding bridge removed, push back vehicle available and ready to start up / push back immediately upon reception of clearance from the TWR
TOP	Tow on Position	A-CDM@FRA process status
TSAT	Target Start Up Approval Time	The time provided by ATC taking into account TOBT, CTOT and/or the traffic situation that an aircraft can expect start up / push back approval Note: The actual start up approval (ASAT) can be given in advance of TSAT
TTDF	Target Time over Departure Fix
TTOF	Target Time over Fix
TTOT	Target Take Off Time	The Target Take Off Time taking into account the TOBT/TSAT plus the EXOT. Each TTOT on one runway is separated from other TTOT or TLDT to represent vortex and/or SID separation between aircraft.
TWR	Aerodrome Control Tower
TWY	Taxiway
TXG	Taxi Given	A-CDM@FRA process status
TXR	Taxi Requested	A-CDM@FRA process status
TYP	Aircraft Type

Acronym	Definition	Explanation
VDZ	Verkehrsdatenzentrale	Fraport Airport Traffic Data Center
VFR	Visual Flight Rules
VK	Vorfeldkontrolle	Fraport Apron Control
vs.	Versus
VTOT	Virtuelle Take Off Time	Internal system time calculated by sequencer system for TSAT gereration
VTTC	Variable Taxi Time Calculation
VZ	Verkehrszentrale	Fraport Airport Traffic Center

Acronym	Definition	Explanation
HMI	Human-Machine Interface	The aggregate of means by which people— the users - interact with the system - a particular machine, device, computer program or other complex tools.
HOT	Handover to Tower
HOT	Hold Over Time

Acronym	Definition	Explanation
LAN	Landed	A-CDM@FRA process status
LoA	Letter of Agreement
LVP	Low Visibility Procedures

Acronym	Definition	Explanation
PAX	Passengers
PBG	Push Back Given	A-CDM@FRA process status
PBR	Push Back Requested	A-CDM@FRA process status
PIC	Pilot In Command
PL	Platzlotse	Air Traffic Controller on the Tower
PMP	Project Management Plan
POS	Parkingposition

Acronym	Definition	Explanation
WBS	Work Breakdown Structure
WP	Work Package

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