Over 100K copies sold The official navigation textbook used in outdoor education courses by thousands of students Map and compass skills remain the foundation for traveling safely in the wilderness This new third edition is a major and complete update of the popular textbook: Improved throughout for clarity, with chapter objectives presented at the beginning of each chapter and summaries, "skills check" mini-quizzes, and practice problems listed at the end Updated descriptions of the most current maps, compasses, altimeters, and Global Positioning System (GPS) receivers Updated declination maps for the United States and the world (declination changes over time and compasses must be adjusted for a specific location to provide correct readings) Much-expanded GPS chapter, including interfacing the GPS receiver with the home computer, maximizing battery life, and using the GPS function on a "smart" phones (along with a description of their limitations) Additional information on non-GPS navigational techniques Recommended websites, apps, and other sources of useful navigational information