"john smith" wrote in message
...
Mike Rapoport wrote:
Recently the COE VOR was notamed OTS. Coincedent with this the KSZT
LOC/DME
was notamed NA. The explanation given was that the COE VOR was nessasary
to
fly the tranition (COE is the IAF) and the missed approach (the missed
ends
with a hold at the COE VOR). I contend that GPS can substitute for the
VOR
but I can't find it witten down anywhere. The KSZT LOC, DME and ADF are
all
working properly. Our question is: Was the KSZT LOC/DME approach
improperly NOTAMed NA? Can you cite a source? Remember we are talking
about substituting GPS for the VOR to fly the transition, we are not
talking
about substituting for the LOC.

Mike,
Google "FAA, sole source navigation, GPS"
There are many articles out there.
From what I skimmed, we are still in transition to becoming sole source.
Sole source is dependent upon other parts such as WAAS and LAAS becoming
accepted as operational.


WAAS has already been accepted as operational. See AIM 1-1-20c.7.:

7. Unlike TSO-C129 avionics, which were certified as a supplement to other
means of navigation, WAAS avionics are evaluated without reliance on other
navigation systems. As such, installation of WAAS avionics does not require
the aircraft to have other equipment appropriate to the route to be flown.

----------------------------------------

The trouble with Google is that it will bring up a lot of outdated material.
The latest edition of AIM is dated 5 Aug 2004. There are already WAAS
certified systems and WAAS approaches out there.