GPS, Chart Plotters, and YEOMAN Waypoint stocks a broad selection of handheld GPS units, fixed-mount GPS and electronic chart plotters, differential GPS, and "smart antennas"--black-box GPS antenna/receiver packages--from Garmin and Northstar. Combine the accuracy of GPS with the safety of paper charts or chart books with YEOMAN; you'll wonder how you ever managed without it! Handheld GPS Receivers Portable, handheld GPS receivers make navigation easy for sailors who mover from boat to boat or for both land and sea navigation.  Today's handheld GPS receivers often are as powerful as a permanently-installed unit; some even feature chart plotter capability.   Fixed-Mount GPS Receivers and GPS Chart Plotters Select a permanently-installed GPS unit or combine a GPS receiver with an electronic charting system for a powerful, easy-to-use onboard navigation system.  Waypoint features systems from Garmin that offer sophisticated functions in packages to suit every sailor's budget.   "Smart" Antennas and DGPS Beacon Receivers Q.  What makes a GPS antenna "smart"?   A.  A complete GPS receiver packaged inside of it! "Smart" Antenna packages are designed to transmit position information to another device--like a computer, radar, or plotter.  All contain a standard GPS receiver/antenna combination; some even include a differential beacon receiver (DGPS) or WAAS-capable receiver packaged in the same small, weatherproof enclosure.