snoop wrote:

him up visually. Because, both airplanes are equipped with Mode S
xponders, and ACAS II rev. 7 TCAS (traffic conflict alert system)
equipment. They can see each others position relative to their own and
their altitude, and it even tells Clutch whether the other guy is
climbing or descending, on their TCAS. Also both airplanes, in todays
world are most likely RVSM(reduced vertical separation minima)
certified, which means that above Flight level 290, up to, I believe
it's up to FL430 now, we operate with only 1000 foot of vertical
separation between aircraft. To receive that certification the
aircrafts static system, pitot, and even the skin around each of those
items has to pass rigorous tests.

Wow, I didn't realize ALL those aircraft built 30, 40 or 50 years ago
have been upgraded and meet these requirements.

Snoop, there's a lot of old airplanes up there that are probably in
worse shape to fly IFR than some sailplanes...

-Tom