ATC
NavCanada Suspends 'Climb/Descend Via' Clearances
ICAO adoption of the new phraseology signaled international acceptance of “climb/descend via” clearances that the FAA implemented in 2014.

NavCanada has temporarily suspended use of new International Civil Aviation Organization (ICAO) “climb via SID” and “descend via Star” phraseology it had adopted on April 27. The agency said the move was made “out of concern over altitude deviations we were seeing in the system and the unforeseen large increase in workload as a result. We are continuing to communicate with airlines, aircraft operators and our employees as we revert to the phraseology rules that were in place prior to this change.​” That clearance phraseology includes both lateral path as well as vertical constraints.

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