Crazy Fish was built and delivered in 1989 was supplied with Datamarine depth, wind and speed instruments.
In 2000 I replaced the Datamarine system with a B&G Network system and was able to use the Datamarine cabling for the run up the mast. Spent a long hot morning into afternoon late October day in Puerto Vallarta at the top of the mast mounting and wiring the B&G masthead component into the system. I also have an old Raymarine Pathfinder Radar which I installed around 1998 that had died.
Sometime around 2005 I put in a Garmin GPS/Chartplotter that transmitted NMEA 0183.
A couple of years ago thinking I was going to replace the chartplotter and the radar I decided to pull the B&G Network system out and replace with the 3 B&G Triton displays and the B&G sail kit all running on the NMEA 2000.
If you get to the point where you are going to replace your chart plotter with one of the newer NMEA 2000 then you may want to do a similiar instrument upgrade. If so then you may want to plan this around the time you would pull the mast as you more then likely you will need to pull the mast to pull the NMEA 2000 cable up the mast.
I replaced the rigging one year and then pulled the mast for NMEA 2000 cable the following and should have done them as one job.
Your NMEA 183 devices will interface to a NMEA 2000 based chart plotter. There are several NMEA 183 to NMEA 2000 adapters on the market and NMEA183 multiplexors to NMEA 2000 adapters which might be a better way to go if you have multiple NMEA 183 devices as NMEA 183 is a single talker/single listener system.
I had 1 device that spoke NMEA 183 left on the the system and that was the Garmin GPS which I linked into the NMEA 2000 system using an Actisense adapter. One of the Tritons displays a page of info generated by the Garmin GPS.
The newer radars seem to all use an ethernet cable to link to their displays and now the displays and radars are sold as separate units. A manufactuer's radar displaying on any number of the same manufacturers displays. The signals have been reversed engineered, open source programmed and can be interperted and displayed on a PC or Mac using the compiled open source code (OpenCPN add-ons).
Perhaps some day there will be a NMEA or similiar standard for the radar signals so that one manufacturers radar will work on a anothers display but not currently.
One thing about running the NMEA 2000 cable - the cable is a simple color coded 5 wire cable and installation of field connectors is a strip 5 wires and use a small screwdriver to connect the individual wires to the proper connection in the field connector. Everything color coded so its pretty straightforward. If you have a tight run cut the connector off or use bulk NMEA wire and use the field connectors to terminate the cable once the run is complete. If the cable is terminated at one end outside I usually use the manufactuer's installed terminator outside, clip off the other connector, run the cable and install a field connector inside. I think Maretron makes the most robust NMEA 2000 cables/connectors for these outside runs.
I still have yet to install a new radar/chartplotter on the boat. It seems that a lot of developments/improvements of radars these days so best to put off the purchase until one is really needed and being based in San Diego one is seldom needed here.
Crazy Fish - Maintaining, Upgrading and Sailing a Crealock 37 | SV Crazy Fish