ATC17 — Electronic Dialogue as automated assistance to controller during coordination and transfer

The operational context of electronic dialogue as automated assistance to controller during coordination and transfer addresses the facilities and processes between ATC components serving ATC units for the purpose of achieving:

1.The electronic dialogue in co-ordination prior to the transfer of flights from one ATC unit to the next.
In the scope of this objective the implementers should use the following OLDI messages in order to perform an electronic dialogue :
- Referred Activate Proposal Message (RAP);
- Referred Revision Proposal Message (RRV)
- Co-ordination Message (CDN)
- Acceptance Message (ACP)
- Reject Co-ordination Message (RJC)
- Stand-by Message (SBY)

2. The transfer of communication from one ATC unit to the next ATC unit of such flights.
In the scope of this objective the implementers should use the following OLDI messages in order to perform an electronic dialogue:
- Change of Frequency Message (COF)
- Manual Assumption of Communications Message (MAS)
- Transfer Initiation Message (TIM)
- Supplementary Data Message (SDM)
- Hand-Over Proposal Message (HOP)
- Request on Frequency Message (ROF)

3. The coordination processes that support the exchange of OLDI messages related to the Basic procedure, specifically Preliminary Activation Message (PAC) and, if applicable, SSR Code Assignment Message (COD).
The system permits controllers to conduct screen to screen coordination between adjacent ATSUs / sectors reducing workload associated with coordination, integration and identification tasks. The system supports coordination dialogue between controllers and transfer of flights between ATSUs, and facilitates early resolution of conflicts through inter ATSU/sector coordination.

NOTE: This objective complements the (mandatory) requirements of basic notification, coordination and transfer functionalities which were covered in ESSIP objective ITY-COTR (achieved in 2015) and regulated by Regulation (EC) No 1032/2006.

NOTE FOR MILITARY AUTHORITIES: It is the responsibility of each Military Authority to review this ESSIP Objective IN ITS ENTIRETY and address each of the SloAs that the Military Authority considers RELEVANT for itself. This has to be done on top and above of the review of "MIL" SloAs which identify actions EXCLUSIVE to MIL Authorities.

Air Navigation Service Provider


Related Elements

Applicability Area(s) and Timescales

Applicability Area:
All ECAC States except: Ireland, Slovak Republic
Timescales From By Applicable to
Initial operational capability 01-01-2013 Applicability Area
Full operational capability 31-12-2018 Applicability Area

Links to SESAR Solutions

Links to PCP ATM Sub-Functionalities


Applicable legislation
Regulation (EC) No 1032/2006 laying down requirements for the exchange of flight data for the purpose of notification, coordination and transfer of flights between air traffic control units.
Applicable ICAO Annexes and other references
ICAO Doc 4444 - PANS ATM
Deployment Programme 2016
Family 3.2.1 - Upgrade of ATM systems (NM, ANSPs, Aus) to support Direct Routings (DCTs) and Free Routing Airspace (FRA)
Operating Environments

Expected Performance Benefits

Reduction of human error due to automation of controller tasks during coordination and transfer.
Reduction of controller workload compared to conventional processes without automated support.
Operational efficiency
More efficient planning and operational decision making.
Cost efficiency
  Code Title From By Related Enablers
REG01 Conduct safety oversight of the changes DELETED
ASP01 Develop safety assessment for the changes
  • 01-01-2013
  • 31-12-2018
ASP02 Upgrade and put into service ATC system to support the Basic procedure (specifically PAC and COD)
  • 01-01-2013
  • 31-12-2018
ASP03 Upgrade and put into service ATC system to support electronic dialogue procedure in Transfer of communication process
  • 01-01-2013
  • 31-12-2018
ASP04 Upgrade and put into service ATC system to support electronic dialogue procedure in Coordination process
  • 01-01-2013
  • 31-12-2018
ASP05 Train ATC staff for applying electronic dialogue procedure
  • 01-01-2013
  • 31-12-2018
Code Dates
1999 99
2000 00
2001 01
2002 02
2003 03
2004 04
2005 05
2006 06
2007 07
2008 08
2009 09
2010 10
2011 11
2012 12
2013 13
2014 14
2015 15
2016 16
2017 17
2018 18
2019 19
2020 20
2021 21
2022 22
2023 23
2024 24
2025 25

Supporting Material

Title Related SLoAs

EC - Regulation (EU) No 1035/2011-(OJ L 271, 18.10.2011, p. 23) - Regulation (EU) No 1035/2011 of 17 October 2011 laying down common requirements for the provision of air navigation services and amending Regulations (EC) No 482/2008 and (EU) No 691/2010 10/2011


EUROCONTROL - EAM 4 - ESARR 4 - Risk Assessment and Mitigation in ATM - Edition 1.0 / 04/2001


EUROCONTROL - SPEC 106 - EUROCONTROL Specification for On-Line Data Interchange (OLDI) - Edition 4.2 - OJ 2011/C 146/11 / 12/2010

ASP01, ASP02, ASP03, ASP04, ASP05

EUROCONTROL - System Supported Coordination (SYSCO) Implementation Guidelines - Edition 2.0 / 03/2011

ASP02, ASP03, ASP04, ASP05

Consultation & Approval

Working Arrangement in charge
Outline description approved in
Latest objective review at expert level
Commitment Decision Body
Provisional Council (PC)
Objective approved/endorsed in
Latest change to objective approved/endorsed in