The GMS 10 Network Port Expander is the "nerve center" of the Garmin Marine Network.
This 100-Mbit switch is designed to support the connection of multiple sensors and the GPSMAP 3006C and GPSMAP 3010C chartplotters/multifunction displays (MFDs).
Completely plug-n-play (automatically detects unit at connection)
100 Mbit Garmin-proprietary network
Totally waterproof connections
Same network cable for direct unit-to-unit or unit-to-port expander