W Sonar Module with 50/200 k - For use with 600W and 1k - W transducers. Depth up to 3000 feet (with higher powered transducer). NMEA0183 connection for speed sensor. Enjoy rapid screen refresh, rich colour palettes and dual-frequency sonar (200/50k - Hz) with up to 2k - W transmit power. Built into every G12 and G10 Multi-Function Display, XD Sonar is an optional upgrade to the GIS 12 and GIS 10. Fish everywhere are now on notice. Easily add XD Sonar to your GIS12 and GIS10 Multi-Function Display with the 1k - W GSM 1000 Sonar Black Box. For XD Sonar plus Side Imaging and Down Imaging functionality, opt for the 2k - W GSM 2000 Sonar Black Box. Get the coverage and performance you need with seven dynamic transducer options, ranging from narrow to wide beams and thru-hull to in-hull mounts. Enjoy rapid screen refresh, rich colour palettes and dual-frequency sonar (200/50k - Hz) with up to 2k - W transmit power. Built into every G12 and G10 Multi-Function Display , XD Sonar is an optional upgrade to the GIS 12 and GIS 10. Fish everywhere are now on notice. Easily add XD Sonar to your GIS12 and GIS10 Multi-Function Display with the 1k - W GSM 1000 Sonar Black Box. For XD Sonar plus Side Imaging and Down Imaging functionality, opt for the 2k - W GSM 2000 Sonar Black Box. Get the coverage and performance you need with seven dynamic transducer options, ranging from narrow to wide beams and thru-hull to in-hull mounts. All feature rugged construction and exceptional sensitivity for accurate and detailed depth readings. Chart Overlay & Split Screen Views Customizable Color Palettes Customizable Color Palettes (Night Palette) Integrated Waypoint Storage Back Track Data Recall Full Screen Mode Ocean Floor Coverage Reach depths of up to 1000m with the high-power 2k - W transceiver. Time Variable Gain Control Use Geonavs preprogrammed gain level or tweak it to get the exact sonar returns youre looking for. Back Track Data Recall Scroll back over the sonar trace history and mark notable sonar returns as waypoints, so you can easily return to that precise location. Integrated Waypoint Storage Save interesting sonar echoes as latitude/longitude reference points for fishing or navigational safety. Customizable Colour Palettes Tailor the color palette to your unique needs and situation with multiple themes to choose from. Instant Screen Capture See something you like? Take an instant screen snapshot and save it to an SD memory card as a future point of interest. Automatic Noise Rejection Filter out interference from the engine and other sources automatically. Sonar Zoom With the touch of a button, adjust your views upper and lower range limits or zoom up and down the water column. « less