The G-Shock GPR-B1000 Rangeman GPS watch is the ultimate survivor device for your wrist. The mud resistant structure, carbon fiber insert band, and ceramic case back make it tough enough to survive the extreme conditions. It combines Recall mode and cutting-edge back-track technology, along with point memory to allow you to find your way in unfamiliar territory. You can synchronize it with your smartphone to project 3D map displays on the screen. It is solar-rechargeable so it always has power when you need it the most. Casio has a winner here.