Garmin GPSMAP 540 GPS Plotter - Also Available with Fishfinder Option This offshore mariner's chartplotter flush-mounts easily in your boat and sports preloaded BlueChart g2 maps for the coast of the U.S. and Bahamas. The GPSMAP 540 also features a 5" QVGA display and simple, straightforward buttons and menus. You can add the optional BlueChart g2 Vision SD card for even more enhanced features. Navigate the High Seas The 540 has preloaded detailed maps covering all U.S. coastal areas and the Bahamas. For other areas, the 540 has a worldwide basemap with satellite images in place of more traditional maps. The SD card slot makes it easy to add additional maps without connecting to a computer. And with just a few buttons and a simple, intuitive interface, the 540 makes navigating your way through the water easy. Add Sonar and Weather Where applicable, the sounder version, GPSMAP 540s , 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. It's also CANet™ compatible, so you can share sounder data with another chartplotter on your boat. For continuously-updated weather information , you can add the optional GXM 31 antenna to receive XM satellite weather, including NEXRAD radar, and hundreds of XM radio stations right on your chartplotter. 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. Physical & Performance: Unit dimensions, WxHxD: 5.9" x 6.4" x 2.9" (15.0 x 16.3 x 7.4 cm) Display size, WxH: 3.0" x 4.0", 5.0 " diagonal (7.6 x 10.2 cm, 12.7 cm diagonal) Display resolution, WxH: 240 x 320 pixels Display type: QVGA display Weight: less than 1.75 lb (0.8 kg) Battery: none Battery life: none Waterproof: yes (IPX7) Antenna: internal NMEA output: NMEA 0183 RoHS version available: no Maps & Memory: Basemap: yes Preloaded maps: yes 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 Features: 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: yes Voice prompts (e.g. "Turn right in 500 ft. "): no Remote control: no Headphone jack/audio line-out: no Audio/video input/output: no Portable: no Automotive/motorcycle-friendly: no