7754 Vol 2 Flyleaf - ICAO Public Maps

V.II-E1
Attachment E
CONSIDERATIONS RELEVANT TO THE USE OF
AUTOMATED DIGITAL DATA INTERCHANGE (ADDI)
FOR ATC COORDINATION
(Paragraph 27, Part V.II — ATS of the EUR Basic ANP and
Paragraph 23, Part V.II — ATS of the EUR FASID refer)
GENERAL
1. The messages used for the application of
automated digital data interchange for ATC coordination
procedures should, to the extent possible, be in accordance
with those specified in Procedures for Air Navigation
Services — Air Traffic Management (PANS-ATM, Doc
4444) unless an alternative format has been bilaterally
agreed. In any event, ATS systems shall support the
construction of the messages based on the provisions
specified in Doc 4444, Appendix 3.
2. The application of computer-assisted coordination
procedures in the EUR region shall be based on a
step-by-step data distribution scheme comprising as a
minimum the two phases NOTIFICATION and
COORDINATION. Messages shall be automatically
generated, exchanged and processed to obviate human
intervention to the extent possible. Furthermore, messages
shall provide the most recent information available on flight
plan data at the time of transmission.
3. The advanced boundary information (ABI) shall be
used for notification, and the activation (ACT),
pre-activation (PAC) and revision (REV) messages shall be
used for coordination. All correctly processed messages
shall be acknowledged by a logical acknowledgement
message (LAM).
4. There shall be bilateral agreement on the
coordination point (COP) and transmission times for each
route. Acceptance by the receiving ATC unit of the transfer
conditions implied in the message shall be assumed, unless
the receiving ATC unit initiates verbal coordination to
amend the transfer conditions.
5. In the event that the receiving ATC unit cannot
correlate the data or that the data is incomprehensible or
illogical, the appropriate ATC sector shall be warned if
identifiable.
6. For detailed information on how to implement, in
the EUR region, the methods of application specified below,
account shall be taken of the current document which
specifies the use of automated digital data interchange for
ATC coordination published by EUROCONTROL and
updated from time to time.
UNITS OF MEASUREMENT
7. This section specifies the units of measurement to
be used in ICAO messages. If other formats are used by
bilateral agreement, they shall contain the same items of
data but not necessarily in the same format.
Time and date
8. All times shall be expressed in UTC as four digits
in the form HHMM with midnight expressed as 0000. Dates,
when used, shall be in the form of YYMMDD.
Geographic position information
9. Geographic position information shall be in
accordance with the provisions contained in Procedures for
Air Navigation Services — Air Traffic Management
(PANS-ATM, Doc 4444).