Wilderness Navigation Handbook
Designed for both land and water use, this comprehensive guide helps unlock the complexity of map and chart reading as it relates to navigation. Beginning with detailed technical descriptions of the tools of navigation—a compass, an altimeter, a GPS system, and a sextant—this handbook shows how to use these tools either individually or in combination with each other to navigate any area. Factors that cause tools and techniques to fail are discussed, such as why an altimeter often shows the wrong elevation, a GPS position is sometimes off track, and the sun often points in an unexpected direction. Twenty-one real-life scenarios provide practical wisdom for even the most intrepid navigator. Specific information on using the moon for directions and the stars for position, measuring boiling water temperature for elevation, map projections, map datums, great circle routes, and the UTM/UPS grid system is included.
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Acamar almanac altimeter altimeter reading altitude base plate calculate catching feature celestial body celestial navigation celestial sphere central longitude chart circle route clock compass bearing compass needle compass rose contour lines datum dead reckoning declination mechanism direction arrow distance Earth's surface east ellipsoid equator example field bearing Gacrux geographic coordinates geographic poles geographic position geoid GPS receiver GPS satellites graduated dial grid lines grid north horizon hour angle lake landmark latitude line of position linear feature longitude look magnetic bearing magnetic declination magnetic poles magnetic south pole measure moon move nearest lower north pole orbit orienteering compass parallel pinpoint position fix prime meridian projection surface radio real world rhumb line ridge rotate scale segments sextant sight slope star steering mark subtract sun's bearing switch Table take a bearing take a field target terrain association trail travel direction triangulation types UTM zones visible waypoint wind