On Tue, 22 Jun 2004 14:20:18 -0700, "John Harper"
wrote:

Not sure what you mean. The glide slope goes on for
ever, it doesn't stop at the outer marker. Given the
right runway and a powerful enough receiver, you could
pick it up on Pluto. (Voyager transmits on 2W or so).

Yeah, but you have to have a receiver tuned to that frequency, don't you?
At least with the receivers I've used in light GA a/c, I've not picked up a
GS signal without tuning to the appropriate frequency.

You would also need to have the CDI in the GPS receiver set to output the
VOR/LOC signal, and not the GPS signal information.


So there you are at 15000' in APP mode and you
pick up a GS, whereupon the autopilot will start a
coupled approach and start you on down the glideslope.
My understanding is that the only difference between
APP and NAV modes is whether the GS coupling
is enabled.

With respect to the STEC50, your understanding is incorrect. The
difference has to do with sensitivity to the signal. And there is no GS
coupling with my STEC50.

If the GS and dest waypoint happen to be in much
the same direction you could get a long way down...


Do other GPS receivers allow you to navigate with both a GPS signal, and
some random GP signal that happens to be in the same direction? The CNX80
certainly does not.


Of course you'd spot this happening and recover (right?)
but still it would be an interesting moment.

I can't imagine a failure mode that would result in this scenario.

Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)