The Router has four physical NMEA 0183 ports (four inputs and four outputs) with configurable speed from 300 to 115200 baud. This allows organization of data exchange between multiple devices with different speeds. Multiple physical listeners can be connected to the Router's outputs.
SeaTalk is a proprietary binary protocol of Raymarine company. It allows co-existence of multiple devices on the bus, so the Router has only one SeaTalk port. A bi-directional converter between SeaTalk and NMEA 0183 supports all known SeaTalk datagrams, including autopilot. This allows controlling SeaTalk autopilots from NMEA 0183 chart plotters and marine apps.