On 10/17/2010 4:43 AM, Mark Dickson wrote:
Sorry, but thermalling gliders will almost always show on radar.

At 23:39 16 October 2010, John Smith wrote:
Mark Dickson wrote:
No, it's Ryanair. They always look for direct routings, even if it
takes them outside controlled airspace.

They can ask as much as they want, it's the controller authority to
allow it or not. But how can I explain this to somebody who
doesn't even
know that class E airspace is controlled?

Contrary to popular myth, gliders show
as a primary return on radar displays

Contrary to popular myth, stationary primary targets are filtered
out by
the radar software, hence thermalling gliders don't show on the
controller's display.


Even if non-equipped gliders show up, there is no altitude info. In the
US, standard procedure is that IFR traffic is not routed around VFR
airplanes, even if they are transponder equipped. If you are lucky, the
IFR traffic will get a traffic advisory. Keep your fingers crossed that
the IFR traffic has TCAS and that the pilots follow the RA instructions.

--
Mike Schumann