Bob Noel wrote:

Also, you might be interested most of the GPS approaches were overlays

(meaning all the obstruction clearance work was already done). Very
few GPS approaches were defined for airports that didn't previously
have any approach, and nothing close to that 70-80% you claim.

--
Bob Noel

Baloney. At this stage of the program many, many airports that did not
previously have an IAP now have at least one RNAV (GPS) IAP. And, there are
many more that had perhaps one ground-based IAP and now have at least one
additional RNAV (GPS) IAP.

As to the BOS, LAX, JFKs, etc, how many IAPs do those airports represent? Last
time I checked there were over 10,000 IAPs in the U.S. No doubt those major
Part 139 airports take a huge amount of resources; then again the airline
passenger pays through the nose to support those facilities.