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    Re: Calculators for Navigation
    From: Dan Hogan
    Date: 1999 Mar 14, 14:49 EST

    Monte:
    Being a small sailboat navigator I usually opt for what will be quick
    and simple. Right now I use HP32SII's. But the idea is to find a method
    and system that you are comfortable with and use it until it is second
    nature for you.
    When I started I used 211(Ageton), but I was prone to mistakes with it.
    I tried 249, easy, but the pages tended to come apart on my wet boat.
    229 were just too large to carry in a boat under 35 feet no nav desk
    and they didn't fit ANY shelves. Then I switched to Weems LOP Book. I
    used that until Hewitt Schlereth published Sight Reduction Tables for
    Small Boat Navigation (a shortened 229 table), which I used until I
    started using calculators. When I was using Weems I could reduce a fix
    in 5 minutes, 229 was faster, the calculators about the same, but they
    lead you through the steps.
    I still use the Nautical Almanac, a log book and home made plotting
    sheets, I round off Lat & Lo to the nearest degree. I find for a small
    yacht going 5-7 knots you don't need, and can't use, accuracy to 16
    decimal places. But on a Coast Guard ship it's a whole different ball
    game! I calculate using the columnar method, this gives me room for
    three sights on a page with comments on one 8.5" x11" page opposite my
    plotting sheet.
    I have a note book of the last navigator on the SS United States, only
    a navigator could recognize that he was reducing sights with 211 using
    the Ageton format, one reduction per page.
    > Does anyone still calcualte thier sites - star and sun via normal math w/
    > out the programmagle ones. I use the Starpath forms to do all my
    > reductions. It is completely by hand.........but, I know what is going on.
    > Is it better to use the programmables instead?
    >
    > LTJG Monte Mechler, CEC, USN
    Dan Hogan
    dhhogan{at}XXX.XXX
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