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    Re: On polar nav
    From: Peter Fogg
    Date: 2002 Sep 12, 12:55 +1000

    Good on you, Robert, you're a mine of information. But if the theodolite tripod
    can be detached from the rest then the instrument part is similar to a sextant
    (?) but would seem much more useful - no worries about a horizon or auxillary
    equipment to replace same, and the instrument could be left standing for the 24
    hour period under discussion; just swung around, kept level with its
    bubble-levels? The tripod is not much more cumbersome than a rifle, for
    example, which no self-respecting explorer would be seen without.
    Which led to another thought - how do you check for index error without a
    What a terrible thing, to talk about being dead wrong about Scott.
    Robert Eno wrote:
    > I can answer the last question:
    > Theodolites are heavy instruments to lug around on a trip to the pole. But
    > most importantly, ever try to use one at -30 C?  It ain't fun, believe me. A
    > sextant is much easier and simpler, to work with under extreme conditions
    > and compared to a theodolite, a little more robust.
    > I think, but am not entirely certain, that Scott took a theodolite with him.
    > I could be dead wrong though.
    > cheers,
    > Robert Eno

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