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Re: Traditional navigation by slide rule
From: Gary LaPook
Date: 2016 Nov 12, 22:30 +0000

That would be simple,just an "A" scale on the frame and a "B" scale on the slide to cover more than just one cycle and the second cycle could be cut off at "3" which would allow speeds from 1 to 30 knots and times up to 300 minutes, 5 hours, will handle time-speed-distance computations. Then a sine scale on the slide that is read against the "A" scale takes care of current triangle computations.

From: Bob Goethe <NoReply_Goethe@fer3.com>
To: garylapook@pacbell.net
Sent: Saturday, November 12, 2016 5:58 AM
Subject: [NavList] Re: Traditional navigation by slide rule

If I can get on top of the fabrication of the 10" rule, I may create a simplified design and build a shirt pocket rule specifically optimized for solving the current triangle and doing speed/time/distance, for the helmsman to use without leaving the cockpit.

Bob

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