Garmin GMS 10 Network Port Expander [010-00351-00]GMS 10 Network Port Expander The GMS 10 network port expander allows you to connect multiple chartplotters and sensors over the Garmin Marine Network. With this robust 100 MB switch, you can connect multiple multi functional displays (MFDs) and sensors to the marine network and gain the benefit of Ethernet like data transfer speeds up to 10 times faster than some competitive systems. Just Plug and Play The GMS 10 and the Garmin Marine Network are