What of marine electronics are you trying to connect?
Because the transmission speed is capped at 4,800 baud, sending too many sentences over a single channel will saturate the bandwidth. This results in lagging data or dropped packets. System designers must limit the sentence output frequency (e.g., configuring updates to 1 Hz instead of 10 Hz) to keep bandwidth utilization below 80%. Nmea 0183 Version 4.11 Pdf-