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    Re: Do you know this instrument ?
    From: David Pike
    Date: 2024 Oct 28, 08:38 -0700

    Several people wrote "It's a stadimeter, a device to determine distance to an object of known height."  
    What's wrong with an ordinary sextant and the one in 60 rule?  E.g. 100ft high, one degree = 6000ft away (ok 5730ft away).  DaveP 

       
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