This compass includes a sighting hole and notch so you can get accurate bearings, as well as a clinometer and a declination adjustment tool. The TruArc needle tilts up to 20° for balanced use anywhere ...
Hang a painting or find your way home with your iOS device This article explains how to use the iPhone compass and level.
Global positioning systems have revolutionized the way people get from point A to point B. Utilizing satellites and orbital data, GPS devices can ping these satellites and compute location anywhere on ...
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