Garmin 531s - Transducer - included transducer - dual-beam

The GPSMAP 531 is a compact chartplotter that features an ultra-bright 5" QVGA color display along with an improved high-speed digital design for increased map drawing and panning speeds. It's ready to go with an easy-to-use interface designed to help you navigate the open waters with ease. The GPSMAP 531 also accepts BlueChart cards for added features and functionality such as high-resolution satellite imagery, 3D views and Auto Guidance technology.Where applicable, the sounder version, GPSMAP 531s, comes with a powerful dual-beam transducer that clearly illustrates depth contours, fish targets and structures whether you're fishing in freshwater or off the coast. The GPSMAP 531s are also NMEA 0183-certified for easy connectivity with sensors, instruments and future marine offerings.