A friend bought a glider. It came with a Borgelt B57 in a box (not in
the glider). There is a Borgelt B50 vario still in the glider. From
what I read the B57 must have a B50 to function. Thus the B57 by
itself is useless. Right?

Also, I read in the manual about "GPS" but there are next to zero
details. I don't even see which pins that power is supplied, or the
voltage needed (comes from the B50?). Does anyone have a wiring
diagram for the Borgelt B57? To a GPS? To a PDA (if even
possible)? The manual on the Borgelt site isn't very illuminating.

Thanks, John DeRosa