"Michael" wrote in message
oups.com...

First off, we've already done it with Class F airspace - we don't have
any in the US. We don't have to have class D either.


We don't have Class F airspace in the US because we have no airspace with
the properties of ICAO Class F airspace. We have Class D airspace because
we do have airspace with the properties of ICAO Class D airspace.