Dunno. THere was on the one I built, but it was an internal adjustment.

Jim


"Rich S." wrote in message
...
"RST Engineering" wrote in message
...

Rich, there ought to be a little tweaky either on the rear of the OBS
case or by removing a knob and finding a hollow shaft for a long, tiny
screwdriver. Find your appropriate ground checkpoint using (as the
fellow suggested) the AFM and tweak it in. Save yourself a few tenths of
an AMU. However, you are merely adjusting, not CALIBRATING, which
requires a certificated repair station.

Aha! Yoost like de compass, you betcha. . .

I don't suppose there's anything one can do as easily for the bearing
displayed on the digital thingy.

Thanks, Jim

Rich S.