After tracing out your route, pull the string straight and measure it against the scale line in the map legend. Another method is to use a compass (the mathematical kind) set to a narrow distance on ...

Here at The Manual, our number-one backpacking essential for every outdoor adventure is the humble map and compass. It’s no ...

This map and an internal magnetic ‘compass’ rely on distinct mechanisms, implying that turtles have two magnetic senses. We developed a magnetic-coil system that could replicate the magnetic ...