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Ken,

> For example, it would be crazy not to use a motorized equitorial
> mount rather than holding the sextant by hand.

Holding sextant by hand does not constitute a problem
(in my experience). The main problem in my case is SEEING
when two stars exactly coincide. The main problem is
with the telescope (and eyes:-).

Perhaps a very high quality 10x or 12x large diameter telescope
will help. My 6x 30mm inverting is by far superior to
the standard modern sextants Galileo scopes, but it is not enough
to determine the arc correction with star distances.
I can also mention capitan Schufeldt (one of the very
few researchers
of the accuracy of sextant observations whose paper is available
to me). He strongly advocates high quality 12x telescopes
for very precise observations.
He also recommends using younger observers for this purpose:-)

Alex.


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