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    Re: The mil as a unit of angle.
    From: Brooke Clarke
    Date: 2003 Mar 11, 17:40 -0800

    Oops,
    
    That should have been 1 yard in 1,000 yards is approximately a mil.
    
    Brooke Clarke, N6GCE
    
    George Huxtable wrote:
    
    > Dour Royer said-
    >
    > The use of a mil-compass is also needed.Mil does not
    > >> stand for military but mil:1,000th of something.The mil-compass is hand
    > >> held and has 6,400 seperate & equal segments in 360*.The compasses are
    > >> also known as lensatic compasses.You can get great accurecy in
    > >> distance,height and position useing the mil.
    >
    > Response from George-
    >
    > It's good that we keep on learning new things on this list. I had never
    > heard of the mil as a unit of angle, nor had I come across insertion and
    > resection in Doug's context.
    >
    > However, it's rather mind-boggling to discover yet another unit of angle,
    > 64,000 in one rotation! Presumably, this is to put compass "points" at
    > round-numbers of units. However, this convention shares many of the
    > awkwardnesses of our 360 degree system. It makes the heart sink, when
    > there's an obvious logical measure of angle just waiting to be adopted, the
    > Turn, to be subdivided into 1,000 milliTurns. When you go through one Turn
    > you get exactly back to where you started, so calculations involving angles
    > exceeding 1 Turn just require dropping the integer part. It's decimal all
    > the way, none of these nasty sexagesimals. Of course, it shares with all
    > other decimal units the disadvantage of not dividing easily into 8ths and
    > 16ths and so on, as were used for compass "points". But we don't use
    > compass points much these days, courses and bearings are nowadays
    > understood simply as a number.
    >
    > Of course, there are serious snags about making such a change. It would
    > require recalibration of all our charts, compasses, and sextants. Not for
    > the faint-hearted!
    >
    > George Huxtable.
    >
    > ================================================================
    > contact George Huxtable by email at george---.u-net.com, by phone at
    > 01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
    > Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
    > ================================================================
    
    
    

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