Say Again? #42: The Mysterious D-Side

The D-side isn't the song on the back of the C-side record ... it's an air traffic controller who uses brains rather than eyes to keep track of planes. A data controller can be the best friend a radar controller (and a pilot) ever had, but due to policy and personell changes, D-sides are becoming rare birds. AVweb's Don Brown explains in this month's 'Say Again?' column.

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