Bob Noel wrote On 12/02/05 15:50,:
In article xl0kf.62898$qw.59268@fed1read07, wrote:


The FAA, and the rest of the world as well, want to eventually shut-down
the VORs. The only remaining ground-based systems will be ILSes.


DME, and probably MLS, will be around for a while longer.


I suspect that having more than 3 levels of backup is counterproductive.
I.e., GPS backed up by Loran backed up by VOR backed up by ADF, etc.
That represents a lot of onboard equipment to go wrong, forget how to
use, etc.

The obvious candidates to go are ADF, marker beacons, and DME.

DME isn't going away soon because the airlines use it. If the airlines
wanted toliets on ballons in the sky, they'ed get them.