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    Re: Artificial Horizon
    From: Millard Kirk
    Date: 1996 Nov 19, 20:59 EST

    Alistair Barclay wrote:
    >
    > Good evening to you all, since the nav list is a bit quiet can we have a
    > small discussion on how to construct a artificial horizon for practice
    > sextant work.I know they are commercialy availale to those of you in the
    > "civilised world" but not to the likes of us in the wilds of Africa !!
    > [lions on every corner, that's why we go to sea ]
    > also I seem to remember reading that you don't take eye hight into account
    > when using A H is that correct? any other things that are different ?
    > regds alistair.
            In reference to artificial horizon.  I made one using plywood. Cut
    two 45d angles pieces out of the plywood attached them together with two
    strip wood at the base to fit over a plastic pan.  Attached two piece of
    glass, window panes will work. In my case the glass was cut to fit the two
    sides or one could make the 45d pieces large enought to fit the window panes.
    Whatever. This is to keep the water or liquid from moving when the wind
    blows.
            Otherwise just plane old used motor oil in an open pan will work.
    But motor oil will move if the wind is strong enough.
            No, there is not correction for height.  Just divide the angle by
    two. Record the  correct time, UTC and complete the sight.
            I shoot the sun at morning, noon and afternoon.  When the moon is up
    I shoot it also.  Two many lights around my home to shoot the stars.
    It took me awhile to get good enought to keep my house from moving all over
    town.  My house seem to stay within 0.4 NM or less of it GP now.
    <PRE>
    --
    Learning the Hard Way!!
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     Millard Kirk KB8YQO 	Email - mkirk@XXX.XXX
     116 Lewis Ave	     	Homepage- http://webpages.marshall.edu/~mkirk/
     Barboursville, WV      A West Virginia Blue Water Sailor
     25504                  (304) 736-6544
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    </PRE>
    

       
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