Yes, Kirk, I have, here north of the PHL Class B. My PCAS (Zaon MRX)
detected it 5 miles away, but I couldn't see it until it was almost
directly overhead. It was 600 feet above me, running through a cloud
layer. I was keeping an eagle eye on the ascend/descend flag as I rode
that street, I can tell you!

-John

On Jan 30, 10:43 am, "kirk.stant" wrote:
I'm curious, though - has anyone out there actually been snuck up on
by an airliner? Not a bizjet, but a no-sh*t great big hulking "250
knots below 10,000" airliner? I've seen plenty of them entering and
leaving the PHX Class B, and they were never really very hard to see.
Now lightplanes, F-16s, or Lears - they can be tough and I've been
surprised by them a few times. C'mon, fess up!