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    Re: Old style lunar (in expert hands)
    From: Fred Hebard
    Date: 2004 Dec 10, 22:20 -0500

    On Dec 24, 2004, at 6:49 PM, Kieran Kelly wrote:
    
    > Its only disadvantage on land is that it is somewhat larger and
    > heavier than a sextant.
    >
    > "Precisely. A theodolite with hardwood tripod legs weighs about 4x
    > times as
    > much as a sextant. Eg I own a Wild T1a theodolite. The combined weight
    > of
    > instrument, carrying case and tripod is 12 kgs. The  Zeiss Yachtsman
    > sextant
    > and case which I use on expeditions weighs 2.8kgs.
    >
    
    A Wild T1 might only weigh 12 kilograms, but the ones used in the 1840s
    for the Survey of India were more on the order of 120 kilograms.
    
    Fred
    
    
    

       
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