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    Tidal heights calculations...
    From: Russell Sher
    Date: 1999 Jul 08, 12:38 AM

    A friends of mine recently did a nav. theory course in which she said the
    'rule of twelfths' is no longer taught for tidal calculations. Instead,
    percentages are used. Has anybody heard of this? - Would that mean 10%, 15%,
    25%, 25%, 25% 10% instead of 1,2, 3, 3, 2, 1 (in twelfths)?
    Regards
    Russell
    

       
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