·GPS chapter completely updated to reflect newer models and features of GPS receivers now available ·Expanded to include a section on routefinding on glaciers, along with additional information on changing declination ·Extensive illustrated examples of orientation and navigationProceed with confidence when heading off-road or off-trail with the second edition of Wilderness Navigation. Whether you are climbing a glacier, orienteering in the backcountry, or on an easy day hike, Mike and Bob Burns cover all the latest technology and time-tested methods to help you learn to navigate-from how to read a map to compasses and geomagnetism.