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Manuel CPDLC V3.0. - Service d'Information Aéronautique Enna

Manuel CPDLC V3.0. - Service d'Information Aéronautique Enna

Manuel CPDLC V3.0. - Service d'Information Aéronautique Enna

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If the aircraft continues with the ADS emergency mode activated ACC Algiers shall assume<br />

the aircraft is in emergency conditions and follow normal alerting procedures.<br />

5.1.3 Acknowledgement of an emergency message<br />

When an ADS emergency accompanied by a <strong>CPDLC</strong> emergency message is received, the<br />

controller shall immediately acknowledge receipt of the emergency with the pilot by the most<br />

appropriate means (voice or <strong>CPDLC</strong>).<br />

5.1.4 <strong>CPDLC</strong> acknowledgment<br />

A <strong>CPDLC</strong> acknowledgment shall be in the form of a free text message using the words<br />

ROGER MAYDAY or ROGER PAN. This uplink free text message requires a response from<br />

the pilot to close the <strong>CPDLC</strong> exchange.<br />

Depending on the nature of the emergency, the free text message may or may not be<br />

acknowledged by the pilot.<br />

5.1.4.1 Voice contact<br />

When an emergency is acknowledged by <strong>CPDLC</strong>, controllers may also attempt to make voice<br />

contact with the aircraft.<br />

5.1.5 Retaining the active connection<br />

If <strong>CPDLC</strong> is the best (or only) communications medium available between the aircraft and<br />

any ATSU, the Algiers ACC (ATSU) with the active connection should maintain that<br />

connection until better assistance can be provided by another means. In this case, transfer of<br />

the connection should not occur to another unit, and any automatic transfer capability should<br />

be disabled, if possible, in order to improve the chances of the <strong>CPDLC</strong> connection being<br />

retained.<br />

5.1.5.1 Communications responsibility<br />

It is recognized that if a transfer of the <strong>CPDLC</strong> connection does not occur, then the<br />

responsibility for maintaining communications with the aircraft is retained by the current<br />

ATSU.<br />

5.1.5.2 Executive control responsibility<br />

In accordance with established procedures, the responsibility for the control of the flight rests<br />

with the ATSU within whose airspace the aircraft is operating. If the pilot takes action<br />

contrary to a clearance that has already been coordinated with another sector or ATSU and<br />

further coordination is not possible in the time available, then this action would be performed<br />

under the pilot’s emergency authority.<br />

Operation Manual of <strong>CPDLC</strong> V3.0 Algiers FIR 66

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