GPS distance VS DME distance

[A Squared]

That location has to be pulled from the database, you cannot plug in the LAT/LON of a LOC/DME antenna and be "legal" to use the GPS for DME if so required on the approach.

Agree absolutely. Perhaps a better way of saying it would be sure you have pulled up the coordinates of the DME antenna from the database, not the location of the ARP.

 

[Doozer]

Under most circumstances, an IFR-certified GPS may be used in lieu of DME.

http://www.aopa.org/whatsnew/newsitems/1999/991213gps.html

AC 90-94 also has pertinent info.

http://www.aopa.org/members/files/ac/ac90-94.pdf

There are some ''gotcha's,'' however, and the AOPA article covers those as well.

Fly safely.