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    Re: How to choose among position lines?
    From: Doug Royer
    Date: 2003 Jun 11, 13:13 -0700

    Jared,you bet.I believe I understand what you're saying.Critique what I
    think you're saying.One  takes 4 sights in a round not spaced 90* apart but
    each one at some degree of seperation.One then takes 2 sights of the same
    body at each Zn and works the plot the same way as if takeing 8 sights
    evenly spaced.
    As for the spaceing of Zn's by divideing the number into 360*,it's a decient
    proceedure used insure a workable Zn spread.I've encountered the same thing
    on study material.I believe it is used to teach the student reduction
    mechanics but is not very practical in real use.Even on a starry cloudless
    night why would a person spend the time to do a 5,6,7,8 or an infinite
    number of sights in a round when a 1 or 2 sight round combined with an
    advance or a  maximum 3 to 4 sight round would give a very workable MPP.It
    would,in my opinion,be smarter to do a number of smaller number sight rounds
    throughout the day instead of all at once.
    
    -----Original Message-----
    From: Jared Sherman [mailto:jared.sherman{at}VERIZON.NET]
    Sent: Wednesday, June 11, 2003 11:49
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject: Re: How to choose among position lines?
    
    
    Doug-
     I wonder, if perhaps dividing the number of sites into 360 degrees and
    spreading them out evenly is counterproductive? Consider that case of 8
    sights. If I plot them evenly about I'll get one smudge on the chart. But if
    I plot two sights each at 4 positions...The difference between the two lines
    from any one direction will also tell me that I have an error of at least
    that amount.
     Wouldn't that information be just as useful?
    
    Aside from star sights at night on a cloudless sea, who would have the
    luxury to take 8 sightings in equidistant directions anyway?
    
    
    

       
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