Garmin's eTrex Vista GPS combines a basemap of North and South America with a barometric altimeter and electronic compass. The compass provides bearing information while you're standing still, and the altimeter determines your precise altitude. The Vista is also designed to provide precise GPS positioning using correction data obtained from the Wide Area Augmentation System (WAAS). WAAS is a system of satellites and ground stations that provide GPS signal corrections, giving you even better position accuracy. The Vista will provide position accuracy to less than three meters when receiving WAAS corrections. It also boasts an internal memory capacity of 24 megabytes, which allows it to accept downloaded mapping data from Garmin's MapSource CD-ROMs (see GRM0001, GRM0002, GRM0003). A silver case gives this unit a high-tech look. New to the product design, Garmin will include marine aids to navigation in addition to the basemap. These navigational aids will be pre-loaded into each unit from the factory.