AIS / Aeronautical Information Service, Ellebjergvej 50, DK-2450 Copenhagen SV, Denmark

TEL: +45 36 18 60 00, FAX: +45 36 18 60 22, E-mail: ais@slv.dk, Internet: www.slv.dk/publikationer

07 / 01

22 MAR

AIC A-07 / 01. Updating of the Central Flow Management Unit (CFMU) System, March/April 2001

(Ændring af flyveplan- og

TACT meldinger)

(Denne AIC udgives kun på engelsk da den henvender sig til bru-

gere der flyver efter Instrument Flyve Reglerne (IFR). Den af Sta-

tens Luftfartsvæsen udgivne publikation af marts 1998,

”Vejledning vedrørende Flyveplaner og AFTM TACT-meldinger”

vil blive opdateret senere)

1.

Introduction

1.1

General

This AIC describes the new or modified functions that will be de-

livered in the CFMU 7.0 software release scheduled for imple-

mentation in March/April 2001. The objective is to provide users

of the Central Flow Management Unit (CFMU) Systems with ad-

vance notice of modifications that will have an impact upon their

operational procedures and/or systems.

The CFMU 7.0 version does not comprise one single major de-

velopment, but includes several changes arising from different

sources including the CFMU Development Plan, requests from

the different users of the system or from the European Air Traffic

Management Programme (EATMP) developments.

The main change in the CFMU 7.0 is the start of the implemen-

tation of the Enhanced Tactical Flow Management System (ET-

FMS). This major modification of the Air Traffic Flow

Management (ATFM) process will not be visible to the outside

world until the Air Navigation Service Providers starts to provide

real time flight position report data. This is planned to start at the

end of 2001.

The ETFMS will have a large impact on the ATFM quality of serv-

ice, by improving the protection of the Air Traffic Control Units

(ATCUs) and by reducing the delays for the airspace users.

Amongst the major visible modifications are:

•

Direct (DCT) limits per Flight Information Region/Upper Flight

Information Region (FIR/UIR).

•

Implementation of a warning mode in Operational Reply

Messages (ORM) due to implementation in Europe/EUR of

the Reduced Vertical Separation Minimum (RVSM).

•

Modification to the syntax of the Slot Allocation Message

(SAM), the Slot Revision Message (SRM) and the Flight Shift

Message (FSH).

•

Internet access in “read only” mode.

Reference AIP Denmark (ENR 1.9) and the CFMU Handbook.

The new functions are described for each CFMU System.

2.

Integrated Initial Flight Plan Processing System (IFPS) –

Implementation 2 April 2001

2.1

Make DCT Limit per FIR/UIR

Each FIR will have the potential for a maximum DCT limit to be

specified (default 200 NM). In addition, an attribute will be intro-

duced to specify that DCTs are not permitted across a FIR/UIR

boundary, where such a requirement exists.

2.2

European Reduced Vertical Separation Minimum

(RVSM)

Full detail of EUR RVSM implementation can be found on the

EUROCONTROL web site. The implementation of CFMU 7.0

prepares the CFMU Systems for full implementation of EUR

RVSM. In particular, during 2001 checks will be made for the

RVSM approval in FPLs (“W” in FIELD 10) versus penetration of

designated EUR RVSM airspace.

In the first Phase (end November 2000 – January 2002):

•

Collection of CFMU data to monitor equipage rate following

the requirement for AOs to insert “W” in FIELD 10a of the

FPLs for appropriately approved aircraft.

In the second Phase (April 2001 – October 2001):

•

Warnings will be output in the Integrated Initial Flight Plan

Processing System (IFPS) Operational Reply Massage

(ORM) if IFPS detects that a Non-RVSM approved aircraft

would incorrectly penetrate EUR RVSM airspace once the

RVSM rules become fully operational.

In the third Phase (October 2001 – January 2002):

•

In addition to the warning provided in Phase 2, several new

additional warning texts will be output in IFPS ACK messag-

es if a potential violation of any

of the IFPS checking rules

against EUR RVSM is detected.

In the fourth Phase (from January 2002 onwards):

•

IFPS may invalidate a flight plan that does not comply with

the EUR RVSM requirements.

3.

Repetitive Flight Plan (RPL)

None of the changes planned for the Repetitive Flight Plan (RPL)

System will have an impact for external users.

4.

CFMU – Tactical System (TACT) - Implementation 28

March 2001

4.1

ETFMS Phase 1A

The first Phase of the Enhanced Tactical Flow Management Sys-

tem (EFTMS) will be implemented with the CFMU 7.0 release.

ETFMS is an upgrade of the present TACT – Computer Assisted

Slot Allocation (CASA) System, which will enable the system to

take into account the real time position of the flights once air-

borne. The main functions that are developed within this first

phase are:

•

Use of real time position data to update the flight plan profile

in TACT.

•

Optimisation of the slot allocation process using the real time

updates of the flights. Late departure notification or modifica-

tion of the airborne path through position reports will be used

to improve Ready Message (REA) flights and other non-de-

parted flights with the current Slot Improvement Proposal

Message (SIP)/Slot Revision Message (SRM) procedures

and messages.

•

Improve accuracy of the counts and flight lists on Remote Cli-

ent Application (RCA)/Remote Terminal Access (RTA) and

TACT workstations to reflect the current and future position

of the flights.

4.2

Consistency in Slot Messages

When small modifications of the Calculated Take-Off Time

(CTOT) are taking place, CFMU terminal displays are updated

but SRMs are not sent, creating confusion on the real CTOT. The

process will improve the consistency between slot messages and

RCA displays to prevent such discrepancies.

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AIC A-07 / 01 - Page 2

DENMARK

22 MAR

DANMARK

4.3

Modification of the Most Penalising Regulation

When the most penalising regulation changes, for whatever rea-

son, an SRM will be issued to inform the AO and the concerned

ATC Units. If the change does not affect the CTOT then, within

the SRM issued, only the fields –REGUL and –REGCAUSE will

be modified, all the other fields will contain the same information

as provided in the previous SAM/SRM. The benefit is a better un-

derstanding of the cause of the ATFM delay.

4.4

Modifications in the Slot Revision Process

When modifications for individual flights or for regulations are

made by the CFMU, some flights may be unduly delayed by the

system. The purpose of the modification is to provide tools to the

CFMU – Flow Management Division (FMD) controller in order to

prevent such occurrences.

4.5

Miscellaneous Improvements in Low Visibility Situations

In some special situations, the process was not working as ex-

pected (slots are kept booked on receipt of non-compliant Run-

way Visual Range (RVR)). Corrective actions will be

implemented to improve the process.

4.6

Modification of the SAM, SRM and FSH Messages

When a flight is shifted and regulated only the SAM/SRM is is-

sued. As there is no clear evidence of the reason of the shift and

the subsequent CTOT, the New Estimated Off-Block Time (NEW-

EOBT) and, optionally, the New Estimated Off-Block Date (NEW-

EOBD) fields will be added indicating that the CTOT is based on

an Estimated Off-Block Time (EOBT) provided by the CFMU. In

addition, when the shift is due to an insufficient RVR, the RVR

field will be added in SAM/SRM and a Flight Shift Message (FSH)

indicating the minimum RVR required as currently provided in the

Flight Suspension Message (FLS).

5.

Remote Client Application (RCA) - Implementation 28

March 2001

5.1

Shortcut Keys on RCA

Shortcut key functions will be implemented to access displays in-

stead of using the pull-down menus.

5.2

Improvement in the AOWIR Access

AOWIR will be available for “Trial” of a new routing 6h00 prior to

the EOBT.

It will be available for “Apply” 3h00 before the EOBT.

5.3

Display Aerodrome Parameters

The value of the following parameters will be available for aero-

dromes:

•

TAXITIME

•

TRS (Time to Remove from the Sequence)

•

TIS (Time to Insert in the Sequence

They will be shown together with their periods of validity. Interna-

tional Air Transport Association (IATA) code of the airports will

also be shown.

5,4

Filling and Sorting of the ANM

Functions will be developed in order to ease the access to indi-

vidual parts of the ANM (FMP, name, …).

5.5

Access to the CFMU Systems via the Internet Site

The CFMU data will be accessible via the Internet. The available

applications will be a subset of the RTA ones:

•

Departure Flight List

•

Arrival Flight List

•

Regulation Flight List

•

ARCID Flights

•

Flights

•

CRAM

•

AIM List

•

ANM Display

•

ANM List

•

CASA Messages

This access will be restricted to authorised users only. Further in-

formation will be communicated in due time on the way and con-

ditions to access.

6.

Route Catalogue

Some improvements will be made to the way the Route Cata-

logue is managed providing an increase in the number of routes

available. None of the modifications will affect the user systems.

7.

Further Information

Further information and documentation can be obtained from:

EUROCONTROL – CFMU

User Relations Bureau

96, rue de la Fusée

B-1130 Brussels

FAX:

+32 2 729 91 89

E-mail:

cfmu.opsdoc@eurocontrol.be

(FO)

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