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Old September 27th 17, 01:56 AM posted to rec.aviation.soaring
Darryl Ramm
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Default Glider near miss with Airliner (emergency climb) near Chicago yesterday?

On Tuesday, September 26, 2017 at 5:32:47 PM UTC-7, wrote:
The CUUPP intersection has a cross between FL180 and 15000, CLSBY between 15000 and 13000. Every once in a while ZAU will drop you down to 9 or 7000 and hand you off to RFD approach. If you don't fly this arrival regularly there's no reason to expect 121 traffic at 7000.


Janesville Eight STAR has "Arrivals expect... 20 miles west of JVL at 13000, TEDDY at 7000" That puts those aircraft right in this area and altitude. While the B737 was clearly not flying that STAR it should set expectations that significant traffic can be in that area. And with possible holds potentially coming at you from any direction. How busy that STAR is in reality I have no idea. Anybody discussed that with local ATC? FAA folks have produced some very useful traffic density maps in other discussions about gliders and traffic safety (intersting to see both the clustering of traffic density and long tail of of outlyers of aircraft being everywhere).