The GPSMAP 420 is a sleek, space-saving chartplotter that features an ultra-bright 4" QVGA display; built-in, satellite-enhanced worldwide basemap and simplified user operation. The 420 also has an SD card slot so you can add additional features with the optional BlueChart g2 Vision card. View Satellite-enhanced Maps The 420's basemap contains worldwide satellite images in place of more traditional maps, and its SD card slot makes it easy to add additional maps without connecting to a computer. With fewer keys and a simple, intuitive interface, the 420 makes navigating your way through the water easy. This Model The Garmin GPSMAP 420 shown here has chartplotter features, but does not include Sounder capabilities. This is only available with the GPSMAP 420s models. Add Sonar Where applicable, the sounder version, GPSMAP 420s, comes with a powerful dual frequency transducer that clearly paints depth contours, fish targets and structure whether you're fishing in freshwater or off the coast. The 420 and 420s are also CANet compatible, so you can share sounder data with another chartplotter on your boat. Add Extras with BlueChart g2 Vision With the optional BlueChart g2 Vision SD card, you can add a whole new dimension of exceptional features to your chartplotter. 3D mariner's eye view or fish eye view provides you with a 3-dimensional perspective of map information, both above the waterline and below it. High-resolution satellite images and aerial photographs help you orient yourself in unfamiliar areas. Auto Guidance technology searches through all relevant charts to create a route you can actually follow - one that avoids obstacles, shallow water, buoys and other obstructions. PRODUCT FEATURES [Back to Top] -------------------------------------------------------------------------------- Built-in analog Sounder: NO Transducer Included: Will not work with this model Garmin radar compatible: no Garmin sonar compatible: yes CANet™ compatible: yes Garmin Marine Network™ compatible: no Supports AIS (tracks target ships' position): yes Supports DSC (displays position data from DSC capable VHF radio): yes Audible alarms: yes Tide tables: yes Hunt/fish calendar: no Sun and moon information: yes 3D map view: yes (with optional BlueChart g2 Vision card) Auto Guidance: yes (with optional BlueChart g2 Vision card) Automatic routing (turn by turn routing on roads): no XM WX Weather & Radio for U.S. compatible: no Voice prompts: no Remote control: no Headphone jack/audio line-out: no Audio/video input/output: no Portable: no Automotive/motorcycle-friendly: no Physical & Performance: Unit dimensions, WxHxD: 5.7" x 5.0" x 2.7" (14.5 x 12.7 x 6.9 cm) Display size, WxH: 2.4" x 3.2", 4.0" diagonal (6.1 x 8.1 cm, 10.2 cm diagonal) Display resolution, WxH: 240 x 320 pixels Display type: QVGA display Weight: 1.3 lb (590 g) Battery: none Battery life: none Waterproof: yes (IPX7) Antenna: internal NMEA output: NMEA 0183 RoHS version available: no Maps & Memory: Basemap: yes Preloaded maps: no Ability to add maps: yes Built-in memory: none (cannot load maps to internal memory) Accepts data cards: SD card slot Waypoints: 1,500 Routes: 20 Track log: 10,000 points; 20 saved tracks