Tauno Voipio wrote:
Steven P. McNicoll wrote:

"Bob Moore" wrote in message
. 122...

Well Steven, why don't you just come right out and tell them
about the Middle Marker?



Because they're disappearing.



There should be a co-located (and associated) DME if
there are no markers, and in can be used instead of the markers.

In the USA, the MM used to be a required part of the ILS system. Now,
nothing is required to replace the MM (not even DME), so most have been
removed.

John