john smith wrote:
DME distances will be greater than GPS distances due to slant-range.

On approach, you're at low altitude and the difference will be in the noise.


Thomas Borchert wrote:

Hi all,

a question that has probably been asked before, but I couldn't find it
in Google:

Is it allowed to use an IFR-approach-certified GPS instead of a DME in
a LOC-DME or VOR-DME approach that does not have a GPS-overlay?
Thanks!