NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
SNO sextants
From: Alexandre Eremenko
Date: 2004 Nov 10, 21:36 -0500
From: Alexandre Eremenko
Date: 2004 Nov 10, 21:36 -0500
Jared mentioned the grease and Freiberger sextants, so I want to ask those who have experience with Freibergers and SNO-Ts: Do you ever disassemble the drum? Does it need inside cleaning? A strange-looking wrench needed for this comes as a standard accessory. I am somewhat afraid to do this: the instruction manual says: never disassemble the sextant. But it also mentions periodic maintenance is a special shop:-) In general, I don't see what is the purpose of this enclosed drum. If it is to keep the worm assembly clean, I would rather make is visible and accessible for cleaning, as in most sextants. By the way, SNO-T comes with a bottle of oil and the manual gives the precise description of this oil (some Soviet standard) and also says: a substitute can be "Aeroshell Fluid 12" manufactured by Shell. Does anyone know what is this? > suppose that if the standard Soviet sextants > were assembled with a grease > that would not freeze up in Arctic use, > that grease might be unsuitable in > the tropics, i.e. migrating too much, > so something as slight as the grease > might be changed. The manual describing my "Tropical" sextant says explicitly that it is suitable for "unlimited region of navigation". > Maybe the color of the > sextant? Maybe. All SNO-T I've seen have the same color: grey. (And now we know that the T stands for "tropical"). Unlike SMO-M which according to Joel comes in variety of colors (I see black, green, brown and grey on maurnavy site). Alex. On Wed, 10 Nov 2004, Jared Sherman wrote: > curious to find out what the > Soviet Navy considered "tropical".