On Apr 7, 11:31*pm, Jordan Pollock wrote:
On Apr 7, 6:09*pm, dbrunone
wrote:

So I bought a glider with an S-NAV&GPS-NAV not long ago, and I don't
really know how to use either. However, when I start up the S-NAV, the
unit thinks I am at 28300ft, when actual elevation is 434ft. Obviously,
it won't let me adjust the altimeter enough to get the right elevation.
On the startup "altimeter" screen, I set the pressure setting to the
same as my regular altimeter (29.92 or whatever), but the altitude
readout is still way off. Anyone run into this? Is it broken, or am I
missing a setting somewhere?

--
dbrunone

I just dial the Snav altimiter down to the field elevation. *Assuming
your Snav is receiving data from a GPS source, that will ensure your
glide slope/ alt differential is accurate. *I suppose your altimeter
and or Snav could need calibrated, unlike every powered aircraft, very
few sailplanes ever get a pitot/static inspection. *I could be wrong
though, I'm pretty new to the same system.

Jordan
ASW20 "E"

I misread part of your post. Might check with Gary at ClearNav
instruments, might need a calibration on the S-Nav, or he could
provide some goo insight otherwise. He's helped me out numerous times
in working out the bugs.

Jordan