GPSMAP 742xs Combo has chartplotting,built-in Garmin CHIRP and CHIRP ClearVüsonar and much more, and we bundled it with theGMR 18 HD+ radome. GPSMAP742xs:Experience an advanced navigation solution with the compact GPSMAP 742xs combo, with a sunlight-readable multi-touch touchscreen display. With built-in wireless connectivity for Garmin mobile apps and VIRB action camera integration, you can stay connected to the newest media. Its 10Hz GPS/GLONASS receiver delivers smooth on-screen navigation.This compact plotter offers full-network compatibility for the Garmin Marine Network, which allows support for sharing sonar, maps, user data, radar, IP cameras and Panoptix all-seeing sonar among multiple units. Plus, theres NMEA 2000 and NMEA 0183 support for autopilots, digital switching, weather, VHF, AIS and other sensors.Anglers, cruisers and sailors alike will benefit from the built-in 1kW traditional CHIRP sonar and CHIRP ClearVü scanning sonar capability (transducer sold separately) for a near-picture quality view of whats beneath the boat. Preloaded premium mapping features both coastal and inland mapping, including both BlueChart g2 HD charts for the US, Canada and Bahamas and LakeVü HD maps. Key Features,GPSMAP742xs 7” high-resolution display with intuitive touchscreen controls. NMEA 2000 and NMEA 1083 support for network connectivity including autopilots, digital switching, weather, FUSION-Link, VHS, AIS and more LakeVü HD provides highly detailed freshwater charts that include more than 17,000 U.S. lakes, rivers and reservoirs and 13,000 HD lakes with 1 contours shoreline to shoreline Heading and position are refreshed 10 times per second thanks to the built-in 10 Hz GPS and GLONASS receiverYou can load up to 5,000 accurate waypoints and find them easily BlueChart g2 HD provides basic coastal charts, tidal stations, currents, depth contours, IALA symbols and it even includes fishing charts The GPSMap 742xs includes expandable memory to accommodate options including BlueChart g2 Vision HD, which adds Auto Guidance and other