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    Re: Sextant on ebay
    From: Bill B
    Date: 2006 Sep 6, 01:53 -0500


    If I recall, Alex's SNO-T (T for tropical?) is painted a light (metallic?)
    gray to reduce heat absorption.  Some manufacturers offer white "tropical"
    models if memory serves.

    I am not clear 0.005" to 0.010" of paint is a great insulator, therefore
    markedly reducing heat transfer to one's digits.  Especially as one hand
    grips the handle while the other tweaks the drum.


    > Red wrote:
    >> "it is not often that you see a polished metal sextant. " Probably
    >> because it is greatly impractical. In the noon sunlight, it would burn
    >> your hands (bare metal) and blind you from glare spots.
    > Why would a highly reflectent polished surface get hotter than one that
    > is painted black? In fact, Plath tried to find a compromise between
    > reducing heat absorption and avoiding glare spots with a model that was
    > painted white.
    > Herbert Prinz

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