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shall respond with an UNABLE message applying to all the
8.2.9.3.1 The urgency attribute shall delineate the queuing message elements of the request and, if appropriate, include a
requirements for received messages that are displayed to the reason and/or information on when a clearance may be
end-user. Urgency types are presented in Table 8-1. expected.
Table 8-1. Urgency Attribute (Uplink and Downlink)
Type Description Precedence
DDistress 1
UUrgent 2
NNormal 3
L Low 4
Table 8-2. Alert Attribute (Uplink and Downlink)
Type Description Precedence
HHigh 1
MMedium 2
L Low 3
N No alerting required 4
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Annex 10  Aeronautical Telecommunications Volume II
Table 8-3. Response Attribute (Uplink)
Type Response required Valid responses Precedence
W/U Yes WILCO, UNABLE, STANDBY, 1
NOT CURRENT DATA AUTHORITY, NOT
AUTHORIZED NEXT DATA AUTHORITY,
LOGICAL ACKNOWLEDGEMENT (only if
required),
ERROR
A/N Yes AFFIRM, NEGATIVE, STANDBY, 2
NOT CURRENT DATA AUTHORITY, NOT
AUTHORIZED NEXT DATA AUTHORITY,
LOGICAL ACKNOWLEDGEMENT (only if
required), ERROR
R Yes ROGER, UNABLE, STANDBY, 3
NOT CURRENT DATA AUTHORITY, NOT
AUTHORIZED NEXT DATA AUTHORITY,
LOGICAL ACKNOWLEDGEMENT (only if
required), ERROR
Y Yes Any CPDLC downlink message, 4
LOGICAL ACKNOWLEDGEMENT (only if
required)
N No, unless logical LOGICAL ACKNOWLEDGEMENT (only if 5
acknowledgement required required),
NOT CURRENT DATA AUTHORITY, NOT
AUTHORIZED NEXT DATA AUTHORITY,
ERROR
Table 8-4. Response Attribute (Downlink)
Type Response required Valid responses Precedence
Y Yes Any CPDLC uplink message, 1
LOGICAL ACKNOWLEDGEMENT (only if
required)
N No, unless logical LOGICAL ACKNOWLEDGEMENT (only if 2
acknowledgement required required),
SERVICE UNAVAILABLE,
FLIGHT PLAN NOT HELD,
ERROR
1/11/01 8-4
Chapter 8 Annex 10  Aeronautical Telecommunications
Note. A separate CPDLC message (or messages) may 8.2.9.5.1 Recommendation. Only the uplink messages
subsequently be transmitted to respond to those elements that appropriate to a particular control sector s operations should
can be accommodated. be provided to the controller.
8.2.9.3.3.5 PANS. When all elements of a single or Note. The CPDLC message set contained in PANS-ATM,
multi-element clearance request can be accommodated, the Appendix 5 was developed to encompass different air traffic
controller shall respond with clearances corresponding to management environments.
each element of the request. This response should be a single
uplink message. 8.2.9.5.2 When considered necessary by the appropriate
ATS authority, additional pre-formatted free text messages
Note. For example, while messages containing multi- shall be made available to the controller for those occasions
element clearance requests are to be avoided, a multi-element where the CPDLC message set contained in the PANS-ATM
downlink message containing the indicated message elements: does not provide for specific requirements. In such cases, a list
of pre-formatted free text messages shall be established by the
REQUEST CLEARANCE YQM YYG YYT YQX appropriate ATS authority, in consultation with operators and
TRACK X EINN EDDF other ATS authorities that may be concerned.
REQUEST CLIMB TO FL350
REQUEST MACH 0.84 8.2.9.5.3 Information concerning CPDLC message
element subsets utilized and, if applicable, any additional pre-
could be responded to with formatted free text messages, shall be published in
aeronautical information publications.
CLEARED YQM YYG YYT YQX TRACK X EINN
EDDF
CLIMB TO FL350 8.2.9.6 Transfer of CPDLC
REPORT MAINTAINING
CROSS YYG AT OR AFTER 1150 Note. Details on CPDLC transfer can be found in the
NO SPEED RESTRICTION. Manual of Air Traffic Services Data Link Applications
(Doc 9694).
8.2.9.3.3.6 PANS. When a CPDLC message contains
8.2.9.6.1 PANS. When CPDLC is transferred, the
more than one message element and the response attribute for
transfer of voice communications and CPDLC shall commence
the message is Y, when utilized, the single response message
concurrently.
shall contain the corresponding number of replies in the same
order.
8.2.9.6.2 PANS. When an aircraft is transferred from
an ATC unit where CPDLC is available to an ATC unit where
Note. For example, a multi-element uplink message
CPDLC is not available, CPDLC termination shall commence
containing
concurrent with the transfer of voice communications.
CONFIRM SQUAWK
8.2.9.6.3 When a transfer of CPDLC results in a change
WHEN CAN YOU ACCEPT FL410
of data authority, and there are still messages for which the
closure response has not been received (i.e. messages
could be responded to with
outstanding), the controller transferring the CPDLC shall be
informed.
SQUAWKING 5525
WE CAN ACCEPT FL410 AT 1636Z
8.2.9.6.3.1 If the controller needs to transfer the aircraft
without replying to any downlink message(s) outstanding, the
8.2.9.4 When a ground or airborne system generates the
system shall have the capability to automatically send the ap-
CPDLC message ERROR, the reason for the error shall be
propriate closure response message(s). In such cases, the
included in the message.
contents of any automatically sent closure response message(s)
shall be promulgated in local instructions. [ Pobierz całość w formacie PDF ]