NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: SNOT design. Was: Why is a sextant like it is?
From: Joel Jacobs
Date: 2004 Nov 20, 22:54 +0000
From: Joel Jacobs
Date: 2004 Nov 20, 22:54 +0000
Alex,
Sorry for the long delay in responding. I'm in St. Mary's, GA after delivering some boat models in Brunswick, GA. They are made of bone in the fashion of POW War of 1812 Dartmoor Prisioner examples. Both Brunswick and St. Mary's are very old Southern seaports. But I digress.
I looked at the links you provided, thank you. Please compare them to these pictures from my own server.
Note that the sextants are the same. The index arm slides behind the arc with a nuckle that allows the tangent screw to ride on the bottom of the arc. I've recntly sold that sextant so I can't inspect it, but I have no recollection that the index arm slid between a front arc and back arc. Or did I misunderstand you.
All the best,
Joel Jacobs
--
Visit our website
http://www.landandseacollection.com
Visit our website
http://www.landandseacollection.com
-------------- Original message from Alexandre Eremenko <eremenko@MATH.PURDUE.EDU>: --------------
> Dear Joel,
> I don't have a digital camera, but you
> can see VERY good pictures of EXACTLY the same
> sextant on
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=37971&item=3762360200&rd=
> 1&ssPageName=WDVW
> and
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=60368&item=3762108473&rd=
> 1&ssPageName=WDVW
> What Russian e-bay traders really do very well is
> photographs:-)
>
> Alex.
>
> On Fri, 19 Nov 2004, Yourname Here wrote:
>
> > Alex,
> >
> > Please send me a picture of your sextant or better yet post it on a website
> where everyone can see it. I will reserve my comments un! til then.
> >
> > Joel Jacobs
> > --
> > Visit our website
> > http://www.landandseacollection.com
> >
> >
> >
> >
> > -------------- Original message from Alexandre Eremenko
>: --------------
> >
> >
> > > Dear Chuck:
> > >
> > > >Add to
> > > >that if the handle were on the opposite side as now,
> > > >the arm would have to
> > > >be in the back between the legs.
> > > >Otherwise the handle would have to span the
> > > >entire front to avoid interfering with the arm.
> > > >This would add weight to the sextant.
> > >
> > > This message made me inspect my SNO-T again,
> > > and I found an interesting thing.
> > > Its design is very diff! erent from the conventional one.
> > > You can see this in many web photographs on e-bay.
> > >
> > > In most traditional sextants, the arm moves
> > > "in front of" or "above" the frame.
> > > In SNO-T (and Freiberger) it moves "inside" the frame.
> > > The frame is of "two layer" construction.
> > > And the arm moves between these two layers.
> > >
> > > This is very different from the C.Plath-type
> > > (Tamaya, Astra, SNO-M) and British
> > > sextants I know.
> > >
> > > Alex.