Climb Via Clearances

Thanks to all the 'what-ifs', ATC's attempt to simplify terminal-area altitude clearances for published departure procedures really isn't all that simple.

There’s only so much airspace. Without minimizing separation requirements—as was implemented with reduced vertical separation minimums, or RVSM, in certain airspace—there’s no way to squeeze more aircraft into a finite area. At the same time, there are only so many ATC facilities and controllers staffing them. Anyone who has flown down the U.S. East Coast […]
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