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    Re: HO 249 v. HO 229 v. Celesticomp
    From: Dan Hogan
    Date: 1998 Jun 16, 7:41 AM

    Rick:
    
    249 has ALL the accuracy a small boat will need. The trouble with 229
    is the volumes of the set and the small print. Also, in my opinion,
    having to plot from an assumed position instead of the DR. I keep
    wondering why everyone thinks 15 place accuracy is required for
    celestial ;^)
    
    Davis makes the only forms I know of, which i don't like. I use a
    column format for my SR. The sample below will need to be adjusted
    for the 229 requirements to calculate assumed position, LHA, d and Z.
    I use it with an HP32SII for celestial proigrammed with a Dozier
    formula. Drift is the calculation for the GHA whole before before and
    after the time of the sight used to calculate the increment.
    
    SIGHT REDUCTION
    BODY            :       |		  |
    DATE            :		|		  |
    GMT             :	    |		  |
    Hs              :		|		  |
    IE              :		|		  |
    Dip             :		|		  |
    Corr'n          :		|		  |
    Ho              :		|		  |
    GHA Hr.         :	    |		  |
    DRIFT           :	    |	      |
    .mmss           :		|		  |
    GHA Aries       :		|		  |
    SHA             :		|		  |
    GHA             :		|		  |
    DR Lo.          :		|		  |
    LHA             :		|		  |
    DR Lat.         :		|		  |
    dec. {at} Hr.      :		|		  |
    v or d          :		|		  |
    dec. {at} Sight    :		|		  |
    Hc              :		|		  |
    Ho              :		|		  |
    a (T/A)         :		|		  |
    Zn              :		|		  |
    
    
    
    Rick Emerson wrote:
    
    > After plotting a round of sun sights with both a Celesticomp and HO
    > 249, I was less than thrilled with the increased error in the 249
    > results.  Or maybe the Celesticomp's errors fit my expected results
    > better...  Anyway, I want to take the step from 249 to 229 and I'm
    > looking for advice on worksheets, etc.
    
    Dan Hogan WA6PBY
    "Gacha" Catalina 27
    San Pedro, CA
    dhhogan{at}concentric.net
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