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    Re: Plotting practice question
    From: Tony S
    Date: 1999 May 07, 17:44 EDT

    Rick-
    Hmmm, well yes/no  :)  The resultant is the accumulation of all errors.
    Since you started with a DR position, that even may be in question.
    Right? Then there are other potential errors accumulated beyond set
    and drift: ie, steering errors, leeway, minor compass errors, etc.
    These are not really discretely identifiable or plottable. Therefor,
    an accurate fix is truth and intermediate stuff can be discarded.
    Programatically, all it can deal with is the track from start (DR) to
    finish (Fix). Does the program accomodate "estimates" for other
    variables? Did I understand your question correctly???  :)
    Tony
    Rick Emerson wrote:
    >
    > I've been tinkering with The Cap'n and found it has a curious quirk on
    > updating a track from a DR postion to a fix.  If, for example, I log
    > positions from DR and then come up with a celestial fix, The Cap'n
    > logs the distance from the last DR to the fix as distance covered.  On
    > my plotting sheets, I simply do a "Scotty, beam me up" and restart the
    > track from the fix without drawing the "DR to fix" leg.  Of course the
    > distance and heading of the "leg" is useful for determining (asessing
    > blame on the) current set and drift but my point is this leg is not
    > distance covered.  Am I missing something?
    >
    > Rick
    > S/V One With The Wind, Baba 35
    

       
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