The 9-axis heading sensor is our premium solution that is easy to install and provides fast calibration and exceptional heading accuracy. Accurate Heading Even at Low Speed – Its heading output at 10 Hz and accuracy of plus or minus 2 degrees ensures your chart orientation and boat heading line match up with reality, even at lower speeds. It also allows for MARPA tracking and improves radar overlay experience. Effective in Rough Waters – You can also be confident your heading information will remain accurate, even in rough sea conditions where your bow is pitching and rolling or — in sailboat applications — when heeled over. Provides heading and rate-of-turn output at 10 Hz and trim and heel output at 1 Hz. Easy Installation, Fast Calibration – The 9-axis heading sensor installs easily with NMEA 2000® plug-and-play interface and a simple 2-step precision calibration process for compatible Garmin chartplotters. For displays other than Garmin, basic calibration is also supported. The heading sensor’s 9-axis MEMS technology allows installation in any orientation located away from magnetic interference. All of our heading sensors are built to withstand bilge environments.