1. Casio PAG240-1CR Pathfinder Multi-Function Sports Watch
It may not be necessary to know the exact time after a disaster, but you will still want to track basic important things such as the direction you are headed in, the temperature and the barometer.
Fortunately, this multi-function watch offers all of these features, along with a backlight, altimeter and water resistance feature that has been tested at up to 100 meters.
At $150 to $250, this watch is definitely pricey, but it could also help save your life. As an added bonus, having so many features in one item will help reduce the total amount of items that you need to purchase and make room for in your bag.