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    Re: Old style lunar
    From: Alexandre Eremenko
    Date: 2004 Dec 16, 09:50 -0500

    It seems clear to me that it is better to measure
    altitudes with lunars than not to measure.
    Both for the accuracy and to reduce the computations.
    (I would use computed altitudes only if no horizon
    is available, natural or artificial, for example
    on a ship in the middle of the night, or on land
    when the altitudes are more than 60).
    Both for the accuracy and to reduce the computations.
    The examples we have seem to show that perhaps
    the procedures of British (Australian) surveyors were different
    from the procedures of the US surveyors:-)
    Anyway, it is interesting to know where the advise
    "not to measure altitudes" comes from and what was
    the justification.
    On Thu, 30 Dec 2004, Kieran Kelly wrote:
    > I know this may not have been true for Thompson et al
    > but the Australian,
    > Gregory always measured the altitudes when doing lunars,
    > as shown in the
    > paper at ld-DEADLINK-com referred to on this list recently.
    > Not sure why
    > he did, (he was later then Thompson)
    > although he achieved extremely accurate
    > results.
    > Kieran Kelly
    > Sydney Australia

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