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    Re: Plotting practice question
    From: Tony S
    Date: 1999 May 18, 18:46 EDT

    Dan Hogan wrote:
    >
    > [Snip]
    > >Dan: re your question ...will you buy 3 to 5 miles?  ;)
    >
    > Well...since rocket science this ain't. My circle of error is my visual
    > horizon.
    We agree. Depending on HE it is about the same. Nav is an art as they
    say. Based on mathematical principles of course.
    > With all the errors introduced by being on a VERY unstable
    > craft, largest boat I ever sailed was a 43 footer, I don't expect much
    > better. I have always started a new DR from the FIX position picking up
    > the log reading at the time of the FIX. I never reset my manual log
    > because doing that seemed to upset the old Walker I had. I just
    > calculated the distance for the leg.
    Now that's being realistic!
    >
    > I get the feeling that all this 16 place "accuracy" that electronic
    > widgets indicate people are expecting something from practical
    > navigation that is just not there.
    Oh, for sure, Dan! This sort of theoretical "accuracy" or "precision"
    is only required in a calculator or computer program as I've done in
    NAVIG94 and others have done in specialized calculators. Otherwise, you
    can imagine how many persons would be prepared to be naysayers (pot-shotters)
    ...right? Even what's called "medium precision" in NAVIG94 is more than
    adequate for almanac and sight checking, which are
    its main purposes.
    Is GPS discussion allowed on your new webkahuna? Just thought I'd ask.
    :)
    Tony
    

       
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