"Steven P. McNicoll" wrote in message
ink.net...

"Ron Natalie" wrote in message
m...

Those circles aren't to keep VFR pilots safe when the weather is
marginal.
They are to lower the floor of controlled airspace for the benefit of
IFR
pilots.

This accomplishes two things:
1. Allows ATC to provide control to lower altitudes, primarily
separation from other IFR aircraft.
2. Makes sure any there is sufficient visibility / cloud clearance
for visual separation techniques to be used between any
VFR aircraft that might be present.


Changing weather has no effect on the floor of controlled airspace.


There he goes again...

But I did not think he said anything about changing the floor of the
airspace for weather, he stated that the lower floor provides transistions
for IFR pilots to get close to the airport, and CLEAR OF VFR traffic in
marginal weather, that should be remaining in Class G and not Class E where
the approach may dump them off.

BT