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    Re: DR plotting techniques
    From: Rodney Myrvaagnes
    Date: 2003 Oct 17, 13:46 -0500

    On Fri, 17 Oct 2003 10:16:41 -0700, Royer, Doug wrote:
    
    >OUTSTANDING George!!! You just answered what was to be my next question(and
    >ultimate goal)after this question was tabulated.You are the 1st to say you
    >correct your charts!!I know that was not in the original question but Bully
    >on you!
    >Part of my duties were to correct all the charts,and log all corrections in
    >the ships log,as required.
    >
    
    I did not discuss this point, but perhaps should have. From about 1984
    to the mid 1990s, we faithfully updated charts from printouts generated
    by the Automated Notice to Mariners system of the US Hydrographic
    Office. This was relatively easy because it was a text-based
    direct-dial modem (or SSB for those at sea) and I could write a script
    that I could start with a keystroke and ignore while it took down
    corrections sorted by chart number.
    
    Before that we used the paper Local Notices. These were not as
    convenient, because each correction was printed once, with a list of
    chart numbers following.
    
    SInce the world-wide web became universal, just getting the updates is
    a manual hassle. I have been much sloppier. We have gotten away with
    this because of the GPS, which lets us identify renumbered ATONs by
    location.
    
    If anyone knows a way to automate the current system, I hope s/he will
    post it.
    
    
    
    
    
    
    
    Rodney Myrvaagnes J36   Opinionated old geezer
    
    Eagles may soar, but weasels don't get sucked into jet engines.
    
    
    

       
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