http://www.WhyGPS.com/GPSInfo/GPSComparisons/index.php http://www.WhyGPS.com/rss/GPSComparisonsTips.xml GPS Comparisons from Why GPS DGPS or differential global positioning system is an enhanced version of GPS that provides a more accurate reading. The DGPS requires a known location as a basis aside from the satellites to calculate their location. This provides for a more concrete and accurate location efficiency. keyword Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/8.php http://www.WhyGPS.com/GPSTips/8.php The right GPS unit for you will depend on your specific needs. For instance, if you want to enter your GPS coordinates manually, there are various GPS units for such purposes. In addition, you may also consider units that have the following features: * Small and lightweight (portability); * Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/12.php http://www.WhyGPS.com/GPSTips/12.php Everything here is © Why GPS, Copyright 2009, All Rights Reserved Worldwide.