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    Compass Check
    From: David C
    Date: 2020 Jan 18, 18:12 -0800

    Over the 2019/20 Christmas/New Year holiday period I treated myself to some books.  HO200, HO214, Inmans, Davis and Burdwood to be precise. I wanted to make use of the books but did not want anything too complicated. I hit upon the idea of checking the compass on my phone using Burdwood.

    As I got into the project I realised that I could do it the old fashioned way using EOT. This required Inmans, which hadn't arrived, for arc to time conversion. However I do have a copy of Raper (1906) which has a similar table.

    I have attached a pdf file describing my working.  I hope that it isn't luck that I obtained such good results! I am suspicious that the phone compass is accurate to four degrees................

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