Do you think the basics of this DGPS system are in place? How can a simple and inexpensive system like this be put back on track and ultimately achieve accuracy greater than a single, commercially ...

Hemisphere GPS brings innovative technology to the XF101 DGPS receiver. Position accuracy and stability are optimized by their exclusive Crescent® Receiver Technology for sub-meter accuracy. COAST™ ...

DGPS technology is the first to economically offer geodetic accuracy meeting the federal planning requirement of 26.2 to 65.6 ft. (eight to 20 m) for harbor and harbor approach navigation.