The North Atlantic will begin a trial program utilizing sat based ADS-B called Advanced Surveillance-Enhanced Procedural Separation (ASEPS). This trial will commence in the Shanwick, Gander and Santa Maria Oceanic Control Areas which will commence on or soon after 28th of March 2019. Aircraft need not apply to participate in the trials as long as they are capable of RNP 4 and RCP 240 where ADS-B service is provided and Controller Pilot Data Link Communications (CPDLC) is available. The use of Sat based ADS-B will enable ATC to provide reduced Longitudinal separations to appropriately equipped aircraft.
The familiar welcome message one gets after log on with CPDLC is being replaced with a request to set your Latency timer to a particular value. This has come about because there have been instances where a delayed CPDLC message was acted upon well after the permissible time frame, in some cases after the message should have expired and not be delivered.
UPDATE ON PBCS REQUIREMENTS: Today 29 Mar 2018 is the deadline for the PBCS capability requirement that allows ATC to provide aircraft with reduced separations based on flight plan entries. Entries for block 10A are now required to show your Required Communication Performance. U.S. Part 91 operators have until 30 Sep 2018 to have the A056 approval reflect the PBCS capabilities.
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