FlyerTalk Forums - View Single Post - Consolidated "Channel 9 Availability" Discussion Thread [Merged]
Old Jan 22, 20, 2:40 pm
Ocn Vw 1K
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I predict that over busy land, and positive radar/GPS air routes, there'll still be time-sensitive radio Controller/Pilot communications for some greater years than FAA or other countries' ATC services predict.

Right now, CPDLC (Controller-Pilot Datalink Communications) are being used at busy and some smaller towers to avoid a lot of radio issuance of routine flight plan clearances and altitude changes up to departure. (Used to require a dedicated tower position radio frequency known as "Clearance Delivery".) And for some years, flight plan, route and altitude changes and clearances "over the Pond" (via Gander and Shanwick) and over the Pacific via Oakland ARTCC Oceanic have been handled via the CPDLC system. But those communications have been under non-positive radar environments which were not normally carried over UA's "Channel 9" audio.
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