It doesn't matter if the airspace around the airport is class C or B it only
matters if the requriements for the approach are met. Usually the hangup is
centerline lighting which is expensive to add. I'm sure that the airports
with frequent low weather are more likely to have the centerline lighting
although many airports in the PNW, including KBFI, do not have it.. I
suspect that there is an element of politics in who gets the money.

Mike
MU-2


"Peter R." wrote in message
...
Mike Rapoport wrote:

Most Cat II and III approaches are at major airports. One of the
requirements is that the runway must have centerline lighting which is
generally only found at the largest airports.

Could the presence of a CAT II or III approach also be a function of a
greater occurrence of low visibility? My home airport, Syracuse (KSYR),
has a CAT II ILS, yet it is only a class C airport. During the winter we
experience heavy lake effect snow bands off Lake Ontario and I had
suspected that this was the reason for a CAT II ILS rather than its size.

--
Peter