Your iPhone's compass is a feature you may not know about, but it can save your life. However, you'll need to calibrate it ...

Use a scale of 1 cm to 1 m. On your map, using compass directions, plot a quicker route from the first tree to where the time capsule is buried. Reverse the directions on the original map to get ...

GPS devices and GPS apps for your phone and even navigation watches with GPX files are nearly foolproof today. But what about when you run out of battery or your waterproof device isn’t as ...