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    Re: "Attainment of Precision" article (1964)
    From: Nicol�s de Hilster
    Date: 2009 Jul 08, 11:08 +0200

    frankreed@HistoricalAtlas.com wrote:
    > If you want a really good value for IC, shoot the Sun or the Moon 
    limb-to-limb ... it's usually more effective than the standard sea horizon 
    test (but the standard test is usually quite sufficient and it's the one that 
    should always be taught).
    could you please explain why the limb-to-limb method is more effective? 
    And can you explain how this is done? What I mean is: are you 
    superimposing opposite limbs onto each other (so calibrating the sextant 
    at the sun's/moon's diameter), or the same limbs (so calibrating for 
    zero at two spots in your field of view)? I take it it is the latter 
    method. Do you have any data supporting the effectiveness?
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