"Andy" wrote in message
oups.com...

Some, perhaps many, NDB approaches had a GPS overlay approach that
could be legally flown with an approach approved GPS. When the NDB
went away so did the approach procedures, including the GPS overlay
approach. Ref SDL AZ.


Looks more like the NDB or GPS-B approach became the RNAV (GPS)-D approach
with the decommissioning of the NDB.