"JPH" wrote in message
news:EEmpg.11443$f76.5591@dukeread06...

I realize that GPS can be used as a substitute, and pointed that out in my
message.


You did? Where?



His question was why the ground based procedure didn't have a chart note
"ADF or GPS required". What I was stating is that TERPS criteria does not
yet allow combining ground based and GPS on the chart, that's why the
procedure does not say "ADF or GPS required" (A temporary NOTAM can
address GPS but the chart can not). As I said, you can use GPS to
substitute in some situations based on regulations other than TERPS, but
TERPS criteria does not yet allow GPS notes to be charted on ground based
procedures (except on the old GPS overlay procedures).
TERPS criteria still requires ground based procedures to be built based
only on ground based equipment, so your not going to see a "GPS required"
note on a ground based procedure.


"ADF OR GPS REQUIRED" would just add unnecessary clutter as it's already
understood that GPS can substitute for ADF in cases like this.