TCAS in my opinion is why you need a transponder! They cost less than a GPS
used to cost and they my keep a 737 or such from running over you. I fly at
the south end of the Dallas Ft Worth TCA and when the wind is from the
north they run Southwest 737's and anything going to Love Field into our
soaring area at and below cloud base. You can buy a Becker transponder or
the other one and have it installed for less than $2,000. This price doesn't
seem to be excessive to me for the mid-air protection that it might provide
you, squawking "1200" and looking around.
Bob Kibby "2BK"




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"Ivan Kahn" wrote in message
news:Ls58b.317778$cF.96452@rwcrnsc53...
IF they are suppressing due to excess clutter, and IF they then turn
suppression off they will see VFR traffic. Normally, they do not suppress.

This began as a suggestion only to call ATC to find out if, and when, they
suppress in your are before spending the money. There are other things,
such
as TCAS, which may well be reason enough to purchase a transponder.

Ivan

So, are you saying that while an IFR aircraft is outside of Class B
airspace, and under ATC control, then ATC will turn off suppression so
they can see the VFR traffic?

If I've got that right, then isn't that what we want? ATC will keep
IFR aircraft away from VFR aircraft (that's me in my glider with my
transponder) while I'm outside of Class B airspace (the usual
situation).

I've never expected ATC to keep VFR aircraft away from me, though this
can happen if the VFR traffic is using Flight Following.

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Eric Greenwell
Richland, WA (USA)