Once upon a time, we humans had to find our way from Point A to Point B without using a smartphone. Encouraging readers 9 to 12 (and some of us adults) to get outside, this illustrated guide and activity book shows how sailors explored the world using the stars, a compass, and dead reckoning, while also explaining the science behind radar and GPS satellites. Among seventeen activities here, you can build your own compass and sextant, and learn how to use trees, the sun, and mapping skills to find your way.