I don't think this is right. In Class B airspace, the only requirement is to be
clear of clounds. That means that an aircraft could be in the clouds at (for
example) 5,000 ft. and other aircraft could be VFR at 4,500 or 5,500, be clear
of the clouds and be quite legal.

Dave Reinhart


"Steven P. McNicoll" wrote:

"Peter Duniho" wrote in message
...

ATC doesn't have enroute radar capable of determining when another
aircraft is within those limits.


Enroute radar? Do you mean Air Route Surveillance Radar? Why are we
suddenly limited to ARSR for discussion purposes? Please, Pete, tell us
about the capabilities of ATC radar.


Furthermore, that assumes accurate reporting by the VFR target's
transponder. Again, an unidentified target would not qualify for
that assumption.


It assumes nothing at all. If a pilot reports he's in the clouds, then any
other
aircraft that is within 2000 feet horizontally, 1000 feet above, or 500 feet
below
the reporting aircraft MUST be in IMC.


There was no such part.


Yes there was. You said ATC can't rely on PIREPs to KNOW something. That's
obviously incorrect.