NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: TLA deficiency
From: Alexandre Eremenko
Date: 2005 Jun 13, 04:20 -0500
From: Alexandre Eremenko
Date: 2005 Jun 13, 04:20 -0500
There was some discussion on this list on this, but most questions were solved when I received the Russian manuals. SNO-T is Sextan Navigatsionnyi s Osvetitelem v Tropicheskom ispolnenii (Sextant for Navigation with Illimination, Tropicalized (for use in Tropics))) SNO-M: the first three letters mean the same, M apparently stands for "Modified". About "Modified" I am not 100 sure. Alex. On Fri, 10 Jun 2005, Lu Abel wrote: > I learned a long time ago that if I saw a word or abbreviation with > which I was unfamiliar to quietly watch the thread and eventually I'd > understand. But we people seem to toss SNO, SNO-T and SNO-M around on > this list, and I've never seen the acronym defined. > > For myself (and those as confused, but not as motivated to ask) could > people please periodically define their acronyms? > > Thanks > > Lu Abel > > Alexandre Eremenko wrote: > > In Russian sextants, collimation adjustment is > > not a feature of the sextant, but a feature of the scope. > > I have never seen an SNO-M in real life, but from the pictures > > I conclude that they come with two kinds of scopes. > > (Like SNO-T). It is the UNIQUE Russian INVERTING SCOPE > > which has the collimation adjustment. > > I have not seen ANY other scope like that, and I wonder why > > all Call Nav books still mention this adjustment > > (which cannot be made on anything but this Russian inverting scope). > > > > All kinds of Russian sextants and scopes that I know can be seen in > > http://www.maurnavy.com/index.html > > Picture 2 shows an SNO-M with inverting scope (which has collimation > > adjustment). > > Picture 1 shows an SNO-T but with ordinary (straight) scope. > > (New SNO-T come with two scopes: ordinary and inverting) > > Picture 4 shows some old sextant resembling SNO-M with > > some old scope (possibly inverting) > > which also has the collimation adjustment, > > but this is not the modern inverting scope. >