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    Re: Benchmarks
    From: Richard M Pisko
    Date: 2003 Oct 6, 23:41 -0600

    On Sun, 5 Oct 2003 19:43:21 -0700, Brooke Clarke wrote:
    
    >These are not USGS type benchmarks but rather someone's GPS receivers
    >readout where a cache is hidden, typically with a log book and pencil
    >for the finder to record their info.
    >
    I tried today for the first time.  I parked with "Geo1" .8 miles away
    at about 282 degrees true.  The actual course length was about 2.5
    miles round trip, and an elevation change of 300 feet each way.  Went
    from prickly pear cactus in shortgrass prairie to Wild Rose bushes in
    riverbottom deadwood piles.
    
    I think I lost five pounds of sweat, but only a little blood.  I
    dunno, I may try a different one tomorrow, since there are so many
    around here.
    
    No way to take sextant sights ... too much wind for an artificial
    horizon. and I was following a ridge line west with a sharp drop off
    to either side.   I could have used a theodolite and tables, maybe ...
    but that setup is pretty awkward going down the coulies, and I slipped
    on a gravel section at about a 100 percent grade.  I think resection
    from known points might have worked if I cut down a tree or two for
    visibility. Besides, I couldn't see the cache until I was about three
    feet away.   (I took bearings from four places at about 100 feet to
    get a closer idea as to where it should be.)
    
    All in all, a GPS unit has a lot going for it in that game.
    
    
    --
    Richard ...
    
    
    

       
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