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    Altitude with artificial horizon
    From: Doug Faunt
    Date: 2021 May 21, 07:28 -0700
    I'm pretty sure the altitude of sights has been discussed, but I wasn't paying attention and can't find it.
    Apparently David Thompson used an artificial horizon, pretty obviously.
    How much difference would his altitude effect his sights?  
    Since I'm up here in the PNW on LADY WASHINGTON, the prototype of which traded on this coast in that period, we've been discussing all the exploration.
    Best, doug

       
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