GPS for Dummies.pdf - Engineering Surveyor

Chapter 5: Selecting and Getting Started with a GPS Receiver89ActivityHuntingFishingBoating (inland and offshore)Canoeing, kayaking (inland and coastal)Useful FeaturesHunting and fishing calendarSunrise/sunset tableUploadable topographic mapsFishing calendarFloats (it’s buoyant)Saltwater tide tableSunrise/sunset tableWaterproofExternal power supplyFloatsNMEA* output (for autopilots)Saltwater tide tableSunrise/sunset tableUploadable nautical chartsWaterproofFloatsSaltwater tide tableSunrise/sunset tableUploadable nautical and topographicmapsWaterproof4 x 4-ing, motorcycling, ATV-ing Electronic compassExternal power supplyUploadable topographic mapsFlyingMapping, data collectionCaving, scuba diving, visiting art museumsExternal power supplyJeppesen database**WAASArea calculationDifferential GPSExternal antennaHelix versus patch antenna***Large number of waypoints andtracksWAASSorry, you’re out of luck! Youneed a clear view of the sky fora GPS receiver to work.*National Marine Electronics Association.**Jeppesen (www.jeppesen.com) is the leading U.S. supplier of pilot information. Its databasesinclude information about airports, radio frequencies, and other flight-planning data.***If there’s tree cover, most users prefer the increased sensitivity of a helix antenna. See Chapter3 for more information about the differences between helix and patch antennas.