Quick Answer
To prepare for GPS failures in the field, invest in a paper map, learn basic navigation skills such as triangulation and dead reckoning, and carry a compass and altimeter as backup tools. Understand how to use a map and compass together for accurate navigation. Practice using these skills before heading into the field.
Preparing for GPS Failures
Before venturing into the wilderness, invest in a reliable paper map of the area, ideally 1:24,000 or 1:50,000 scale, as this will provide the most detailed topographic information. Familiarize yourself with map symbols, contour lines, and scale. Make sure you have a compass that can hold a declination adjustment for your location.
Basic Navigation Skills
Learn basic navigation skills such as triangulation, dead reckoning, and pace counting. Triangulation involves using two known points and a third unknown point to create a triangle on the map. Dead reckoning involves tracking your movement and using your speed and direction to estimate your current location. Practice these skills by setting up mock scenarios in a familiar environment. Use a pace counter to measure your stride length and estimate distance traveled.
Alternative Navigation Tools
Carry a compass and altimeter as backup tools in case your GPS fails. A compass can help you determine direction, while an altimeter can provide an estimate of your elevation. Learn how to use these tools together to create a more accurate navigation system. For example, if you’re at an altitude of 5,000 feet and you know the terrain, you can use your compass to determine the direction of a known landmark.
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