The Abrams Sun Compass

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=4U8XZpYU2dw

The Abrams sun compass is a WWII era navigation device for use in the desert - it works differently from the Bagnold sun compass but I think this is easier to learn to use and requires less preparation in comparison. On the other hand, if you don't mind the extra work, the Bagnold compass appears easier to use in the field on the move. I've omitted some of the more tedious details which wouldn't be of interest to someone that didn't have the device on hand. This compass can also be used at night. Video of that soon. • This looks similar to the Cole compass and may work in similar manner. • What I called local solar time is correctly Local Apparent Time (LAT). • I rushed through the time conversion so here's how to do it. Take your local watch time subtract daylight savings time if it is in effect. Now determine how far east or west (in degrees) you are from the center of your time zone*. If east, add 4 minutes per degree to your time, subtract if west. Now lastly, factor in the equation of time** which you can find on the date bar of your compass. Add or subtract that to your time and you now have what is called 'local apparent time'. Easy, the manual took 8 pages and 3 diagrams to explain that and I believe the example within is easy to misinterpret when using the time zone chart. • https://susdesign.com/popups/sunangle... • *If you are moving east or west for long distances you will have to adjust for the time zone factors more often. • ** The equation of time on the date bar is from 1943 but comparisons with the EOT contained in the Nautical Almanac indicate it is still accurate for use today.

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