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Compass, magnetic and true course.

Calculates true, magnetic and compass direction(course, bearing) by given direction, magnetic declination and deviation.

Magnetic compass navigation.Creative Commons Attribution/Share-Alike License 3.0 (Unported)
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Conversion between imperial and metric units of area

These calculators convert imperial to metric and metric to imperial units of square

Imperial/UK - Metric units of area conversionCreative Commons Attribution/Share-Alike License 3.0 (Unported)

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