"Dane Spearing" wrote in message
...

The use of an approach certified GPS in lieu of an ADF is addressed in
AIM 1-1-19f. See:

http://www.faa.gov/ATPubs/AIM/Chap1/aim0101.html#1-1-19

In a nutshell, yes, you can use your IFR approach certified GPS in lieu
of an ADF for identifying the OM on an ILS approach, and/or for
identifying
a missed approach fix.


Use of GPS in lieu of ADF and DME is covered in that paragraph, but I see no
mention of use of GPS in lieu of a marker beacon receiver. While an ADF can
certainly identify an LOM, it won't identify an OM.