The Gpsmap 78S Is A Portable High-Sensitiity Receier With A 2.6" CVolvor Transflectie Lcd Display, A 3-Axis Electronic Compass, A Barometric Altimeter, A Worldwide Basemap With Shaded Relief, And A Microsd™ Card Slot For Additional Maps. With The High-Sensitiity Gps Receier And The Exclusie Hotfix® Satellite Quick Acquisition System, The Gpsmap 78S Quickly And Accurately Locates The Position And Ensures Optimal Reception In Any Enironmental Condition. The Deice Is Waterproof (Ipx7) And Has A 1.7 Gb Internal Memory. The Gpsmap 78S Features A 3-Axis Electronic Compass With Tilt Compensation And A Barometric Altimeter That Tracks Pressure Changes And Indicates Precise Altitude. The Deice Can Be Used To Track Barometric Pressure Oer Time And Obsere Any Changes In Weather Conditions. The Deice Comes With A Preloaded Worldwide Basemap With Shaded Relief That Can Be Enhanced With Optional Mapping And Functionality. With A 3.5 Gb Internal Memory And A Microsd Slot, Topographic Maps, Bluechart® G2 Marine Charts, Or City Naigator Nt® Road Data Can Be Used To Create A Route With Turn-By-Turn Directions. The Gpsmap 78S Also Supports Birdseye™ Imagery Integration (With Subscription) And Is Compatible With The Free Custom Maps Software, Which Can Conert Paper Maps Into Downloadable Electronic Maps For The Deice. The Gpsmap 78S Allows For Wireless Sharing Of Waypoints, Tracks, And Routes With Other Compatible Garmin Deices. The Deice Is Compatible With The Garmin Birds Eye™ Serice, Proiding Access (With Subscription) To The Largest Global Database Of Satellite Imagery, And Is Capable Of Managing Raster Mapping Generated From Scanning Paper Maps Through The Custom Maps Application.