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Re: Bob Goethe's Mark 2 Navigators slide rule, test drive comparisons.
From: Sean Johnston
Date: 2019 Nov 21, 15:37 -0600

Thanks Tony, but I really can’t take much credit.

They are just reworked drawings from books by:

David Burch

http://davidburchnavigation.blogspot.com/2015/11/the-navigation-triangle.html

and

George Mixter

https://www.amazon.com/Primer-Navigation-Seventh-George-Mixter/dp/0393332101

On Nov 20, 2019, at 10:16 AM, Tony Oz <NoReply_TonyOz@fer3.com> wrote:

Dear Sean!
The pictorial hints on your rule are SUPERB!!!
Warm regards,
Tony
60°N 30°E

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