Give your vessel tremendous capabilities and features that are fully integrated across your entire marine system. This black box system is compatible with Garmin marine monitors or third-party touchscreen monitors (sold separately), allowing you to add to your current helm configuration or build a beautiful, new fully integrated glass helm. The GPSMAP 8700 black box allows you to add and integrate multiple sonar technologies as well as autopilot, connected services, apps, engine data and multimedia at your helm. NMEA 2000 networking and the Garmin Marine Network allow you to easily build your full marine electronics suite — from radar and autopilots to cameras, instruments and forward-looking sonar — controlled from your chartplotter and shared across multiple screens. In addition, our exclusive OneHelm system coordinates many third-party manufactured onboard marine products to bring full control of systems — such as digital switching, lighting, stabilization and more — to your touchscreen monitor. The GPSMAP 8700 black box can pair with our GPS 19x external 10 Hz GPS and GLONASS receiver (sold separately) to update your position and heading 10 times per second. This black box system requires a Garmin Card Reader.