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    Re: Traditional navigation by slide rule
    From: Gary LaPook
    Date: 2016 Sep 26, 23:41 -0700

    I had never noticed those gauge points. Looking at some of my slide rules I see that they have them except one K&E 4081-3 that has a "SRT" scale instead of an "ST" scale. I don't understand the difference between these two scales. I have attached a photo of several of these slides. At top is K&E 4080-3 with scale in degrees and minutes and the gauge marks. Second is a K&E 4081-3 in degrees and tenths, SRT scale and no gauge marks. Third is another K&E 4081-3 with ST scale and gauge marks. Bottom is a Pickett N3-ES with ST scale in degrees and tenths and gauge marks.

    I have attached the information about the use of these gauge marks from the K&E 4080 manual, 1939 edition.

    gl



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