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    Re: recommendation for slide rule ?
    From: Gary LaPook
    Date: 2009 May 21, 15:20 -0700

    I can't think of any advantage to having S and T scale on the body in
    addition on the slide for the normal method of calculating Hc and Az.
    The pictures I found on line appears to show that the rules lack the
    ST scale so don't cover small angles which could cause problems..
    On May 21, 6:28�am,  wrote:
    > Gary,
    > British brand UNIQUE offered several sliderules of cheap construction, but
    > interesting scale layouts. Among them was so called "Unqiue navigational". In
    > addition to normal log scales it featured sine and tangent scales located both
    > on slide rule body AND slide. Allegedly this would make certain trig
    > calculations easy.
    > Whould it be more convenient to calculate a celestial fix with this layout? 
    If not, what other navigational calculations would be simplified?
    > Unique Navigational may be seen on various places on the internet, for example
    > here:http://www.mathsinstruments.me.uk/page14.html
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