The HDS-10 Fishfinder/GPS Chartplotters from Lowrance feature massive 10.4'' high-definition SolarMax - PLUS screens for the highest-contrast picture detail and the best wide-angle viewing available. Lowrance's innovative FlyWheel scroll dial and one-touch soft key menu provides anglers with greater control for faster and simpler fishfinder function. HDS-10 models featuring Lowrance's innovative high-definition Insight USA mapping offer unprecedented detail of both inland and coastal areas with contour shading delivering a stunning lifelike perspective of bottom topography. The HDS-10 model with Enhanced US Basemap offers the same inland and coastal coverage area as Insight, with 100,000 bodies of water and 5,000 lakes. The Lowrance HDS-10 Fishfinder/GPS Chartplotter features: Massive high-definition 10.4" super VGA color viewing Brilliant enhanced SolarMAX? PLUS display with fully adjustable pure white LED screen/keypad backlight Built-in Broadband high-definition sonar and super-sensitive GPS antenna Unique FlyWheel? and soft control keys for faster functions access Built-in, exclusive Insight USA? mapping or Enhanced US Basemap model choices. Insight USA? mapping provides stunning lifelike contour presentation. Two high-speed SD card slots for optional detail mapping display and sonar/GPS data recording (cards not included) Skimmer? transducer with temp included Navionics Platinum+, Platinum and HotMaps Platinum with TurboView compatible (sold separately) HDS puts you in control! Easy to use, too!: Vastly improved angler control, with unique FlyWheel? scroll dial, plus soft command keys, for faster and simpler fishfinder functions control on HDS-10 Unique menu display lets you fly through functions control with the greatest of ease and speed Brighter SolarMAX? PLUS screens deliver the highest-contrast picture detail and the best wide-angle viewing available From fantastic brilliance in direct sun to zero-dim at night, adjustable super-white LED backlighting is the best for all fishing conditions As of May 15, 2009 all Lowrance HDS units are now Navionics compatible. Click here for free Lowrance download features Navionics support and expanded HDS performance enhancements.