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    Re: Gunther Rules for Navigation
    From: Jackson McDonald
    Date: 2017 Apr 21, 02:48 +0000
    My high school physics classroom, in Cocoa, Florida, adjacent to Cape Canaveral and Kennedy Space Center, had a giant slide rule hung from chains in front of the blackboard.   

    We learned to use the slide rule, blissfully ignorant of the fact that hand-held, electronic calculators were just a few years away for ordinary folk.  A real but quiet revolution.  

    What's next?  I believe that, even in the age of GPS, there is a legitimate need for a modernized sextant, with an incorporated, electronic calculator containing all the necessary ephemera.  

    Plath was evidently working on such an instrument before being drowned by the GPS tsunami.  

    Is there still a need (market) for such a next-generation sextant? 


    On Apr 20, 2017, at 7:10 PM, Ed Popko <NoReply_EdPopko@fer3.com> wrote:


    Your check of the scales is very helpful.  Thanks for the cut.

    Before this thread, I had not ever looked at old editions of Bowdith for Gunther Rule information, always fixed on other topics. This is shortsighted for sure as there is a wealth of information and technique which tie a lot of navigation practice together.

    I get personal flashbacks when looking at slide rules of any kind. When I entered a college engineering program in the early 1960s, you were first required to attend a summer school program (two sessions per week for six weeks) to learn how to use a rule. It was non-credit (pass or fail) and taught by a Cape Canaveral engineer as part of some science public-outreach program. The classroom had an enormous sliderule hung by chains from the ceiling. And every lecture was how to use a different scale and followed by take-home problem-sets.


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