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    Re: Leg 48
    From: Dan Hogan
    Date: 1999 Mar 11, 09:34 EST

    M. Lieberman:
    > Leg 48:
    >
    > 1. DR 34deg 22.4' S   155deg 22.3' E  by meridonal parts calculation. I
    > elected to use the steered course of 89.1M  or 103.6 T . Since a DR was
    > asked for I did not factor in current
    Your OK. Remember this is DR and celestial navigation "an art", not a
    manmade accurate to 16 decimal places and dependant on electrons
    system. And I threw in a twist here.
    > Last FIX was at 19:32:20 Zone Time (+10) or 9:32:20 GMT , adding the
    > 10:57:58 to run the
    > 95.5 miles gives 20:30:16. The date stays the same, 17 Feb 99.
    >
    > 2. DR now 34deg 33.7 S  155deg 54.7 E. Again, no current correction
    OK everything is consistant.
    
    > 3. New true course is 112.8 deg.
    OK. My fault I didn't specify that the previous current still applied.
    
    > 4. I think I need a FIX before I can calculate the Course made good.
    Use CDMVT and the current.
    > 5. I get a DR of 35deg 4.5' S   157deg 24.1 E.
    Your navigation is consistant. I threw you off with Q3. But as you'll
    see NOT LOST.
    >
    > 6. I discarded Rigil Kentaurus because of the low sight ( lazy, too) and
    > came up with a FIX of 35deg 00.2' S  156deg 59.6 E. (By calculator)  This
    > is 20.5 miles and 282 deg. from the  DR position. I now get a course made
    > good of 116.5deg T from the #2 DR.
    Good FIX.
    > 7. Seems to be Jupiter. (by calculator after a long wait)
    Yes. Easy way is by inspection, using GHA and the Nautical Almanac.
    Dan Hogan WA6PBY
    dhhogan{at}XXX.XXX
    Catalina 27 "GACHA"
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