NavList:

   

Reply

George,
This is an interesting idea:

On Fri, 4 Nov 2005, George Huxtable wrote:

> Another question. Can you improve the accuracy achievable with such a
> device, by holding it (or strapping it with sticky-tape) in front of the
> objective of a sextant's telescope?

Or any other telescope or monocular.
I think it is worth trying. The thing which worries me is
safety. Bris "sextant" is so small that it will not cover the objective
lens of any telescope, and it is absolutely necessary to cover the whole
of it when you look at the Sun.

Essentially my proposal would be to make an attachment to the telescope
in the form of a larger (round?)
Bris sextant which can be attached in
front
of the objective lens.
Or to make a square hole in the usual objective
lens cover and fill the hole with the Bris sext.

This certainly should improve precision.
(I had too few observations to make reliable statistics, but it seems
to me that my observations with Bris have similar precision to my
observations with ordinary sextant without a scope. (I made several
observations without scope being unable to keep the Sun and the horizon
in the field of view during rough weather)).

Alex.

   

Reply