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    Re: The Rude Star Finder and teaching stars
    From: Jeremy C
    Date: 2010 Nov 14, 08:14 EST
    Alan wrote:
     
     
    2. Re the 5 star fix mentioned, I've shot 3 body fixes, ending up with a triangle, sometimes a small triangle, other times a not so small trialgle, this standing on the beach. What sort of figure might one get with a 5 body (star) fix, a pentagon?
     
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    When you start plotting lots of lines like this, the plotting sheet looks pretty crowded.  If have a great round where there is little individual LOP error and the scale is pretty small, then the pencil makes a nice dot on the sheet.  If you have a less than stellar round, you start getting multiple triangles which actually confuses the matter of your position.
     
    You can do all sorts of computer analysis of probability , with the 95% ellipses and the like, but in the hurry up real world out here, you choose which triangle looks or feels the best and put your fix down there.  In the middle of the ocean, that mile or two difference between the various triangles and intersections isn't going to make any difference at all.
     
    Personally, I find the plotting process of many stars tedious and prone to graphical error, especially using AP tabular methods.  These days I shoot a round of stars, plug the data into the software, and it gives me the mathematical most probable location of my ship and spits out a Lat and Long.  I then transfer the Lat and Long from the computer and scribe my fix surrounded by a circle and label it "* fix {at} `time`"  This is quick, accurate, and neat.
     
    Jeremy
       
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