...

'Seems highly unlikely that the glider had a transponder, else the 737 would / should have received an alert / warning from controllers.

I personally wouldn't want to fly a sailplane in a busy area like that w/o a transponder.

When i look at the "flight track" image in the cited article, i'm not at all able to tell which "right turn" would have been the emergency maneuver. Nothing (at least compared to all others) appears "extreme". Perhaps the resolution of the tracking doesn't allow for it.


Karl
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Boulder CO (another very busy airspace)