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    Re: Silicon Sea: Leg 83 answers
    From: Dan Hogan
    Date: 2002 Sep 20, 09:41 -0700

    On 19 Sep 2002, at 16:26, Paul Hirose wrote:
    
    > 1. The navigator should see the peak of Mauna Loa about 135 miles out.
    
    OK
    >
    > 2. TC = 286. Subtract 1 degree for current. Subtract 11 degrees for
    > compass error. CC = 274 to Mauna Loa.
    
    OK
    >
    > 3. Nearest multiple of 15 deg longitude is 150W, so we are 10 hours
    > behind UT
    OK.
    >
    > 4. DR at 140 mile point is 19 24 N 154 32 W.
    OK
    >
    > 5. TC = 305. Add 1 degree for current. Subtract 11 degrees for compass
    > error. CC = 295 to pass Cape Kumukahi.
    OK
    >
    > 6. Distance from passing Cape Kumukahi to Hilo entry point is 26
    > miles.
    OK
    >
    > 7. Total DR distance from the running fix to Hilo entry point is 177
    > miles. At 10 knots we should arrive there July 17 about 0100Z, or July
    > 16 1500 ZT. That ignores any current.
    
    Someone is off on the time. RFIX 01:44:36 UT {at} 16/07/2001. We are in ZD +10.
    >
    >
    > I used a piece of typing paper to make a plotting sheet. The horizon
    > distance and heading computations were done on an E-6B aeronautical
    > slide rule. The wind side works perfectly well for current; you just
    > mentally divide the speed markings by 10 or 20.
    
    This is the way I navigated for years. I still do on my boat, when I go long.
    I still carry my original Dalton E-6B.
    
    
    
    
    Dan Hogan WA6PBY
    C27 "Gacha"
    dhhogan1---.net
    Nav-L Page: http://www.wa6pby.com
    
    
    

       
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