"atis118" wrote in message
om...

Yes, in order for a towered Airport to be class "D" it must have
surface based weather observation cabability, if not it is class "E"
and in some cases class "G" airspace.


That's not correct. All surface areas, Class B, C, D or E, require weather
reporting capability.



And as I believe others have
already said, only Class "B" airspace provides VFR seperation, hence
the 3SM visibility, clear of clouds VFR minimum.


Class C airspace provides separation between VFR and IFR aircraft, TRSAs
provide it between all participating aircraft.