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    SNO sextants
    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".
    
    
    

       
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