"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.


I never said it did.