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Aviation Glossary :: DEPARTURE CLEARANCE VIA DATA LINK  Aviation Glossary :: DEPARTURE CLEARANCE VIA DATA LINK FAA Written Test Preparation
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DEPARTURE CLEARANCE VIA DATA LINK
DEPARTURE CLEARANCE VIA DATA LINK
DEPARTURE CLEARANCE VIA DATA LINK (DCL): Provides assistance for requesting and delivering information and clearance, with the objective of reducing aircrew and controller workload. The DCL service shall be initiated by the aircrew at a suitable time between Ti and Tt where:
  • Ti – the earliest time at which a DCL service can be initiated;
  • Tt– the latest time after which an aircrew, having not completed the DCL service, is still able to receive by voice procedures and in due time, the vocal departure clearance.
The third time parameter of the DCL acknowledge procedure is T1 where:
  • T1 – timer implemented in the ATS ground system between the sending by ATS ground system of the DCL clearance message and the reception by it of the read-back of DCL clearance message.
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source: ICAO Aviation Chart Glossary


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