NMEA 0183
NMEA 0183 Marine Networking Cables & Components
Legacy NMEA 0183 networking cables, converters, and components for marine electronics. Our collection features NMEA 0183 products from Actisense and other manufacturers for connecting older marine electronics:
- NMEA 0183 Cables - Serial data cables for marine electronics
- Multiplexers - Combine multiple NMEA 0183 inputs
- Converters - Convert between NMEA 0183 and NMEA 2000
- Splitters & Buffers - Distribute NMEA 0183 data
NMEA 0183 is the legacy standard for marine electronics communication, still used by many older systems and some modern equipment.
Modern Alternative: Part of our Networking collection. Consider upgrading to NMEA 2000 for modern installations. Use Actisense interfaces to convert between protocols. Connect chartplotters, autopilots, and instruments.
Bridging legacy and modern networks
NMEA 0183 is a simple serial standard, but it has one limitation that catches people out: each 0183 port typically accepts only one talker, so a chartplotter with several instruments trying to feed it data at once needs a multiplexer to combine those inputs into a single stream before it reaches the display. Older instruments and AIS receivers often run at a different baud rate to GPS or radar data, so a multiplexer or converter also needs to handle that mismatch rather than just merging wires.
Where a boat mixes older 0183 instruments with a newer NMEA 2000 backbone, a converter lets the two talk to each other rather than forcing a full rewire; this is usually more practical than replacing working legacy kit purely to get it onto the newer network. Wiring itself is simple, two-core screened cable for most connections, but polarity and screen grounding matter more here than on the twisted-pair, self-terminating NMEA 2000 backbone.
If you're not sure whether a converter or a multiplexer is what your setup needs, ask us and we'll talk it through.
