Steven P. McNicoll wrote:
"Hilton" wrote in message
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[Obvious replies inserted] And that is? How would you identify it?



Since I'm on the GS when my GS receiver fails my distance from the MAP is
directly proportional to my altitude above DH. A 3 degree GS drops 318' in
each nautical mile. If I'm about 1000' above DH I'm about 3 miles from the
MAP. Simple.


So, you're reverting to timing anyway. The only difference is you start
your timing at a point other than the non-precision FAF and try to
figure it out as you go. (Let's see, I was passing 2650 when I lost the
glideslope a few seconds ago, the DH is 852, the glideslope is 2.8
degrees, I drop XXX amount of feet from here to there at a rate of XXX
ft per mile, so I'll cover that distance in XX minutes/seconds). Sounds
like it would be a whole lot simpler to start the timing at the
non-precision FAF than try to do those computations on the fly as you're
starting to climb as you're trying to figure if it's your equipment or
the glideslope failure.

John