Time for some modern instruments on my Catalina 270!
See also my related pages on:
Here is an wiring diagram of my setup:
It would be nice to get some NMEA2000-compatible transducers but
that requires another haulout and a lot more work so... I installed
the Raymarine iTC-5 translator. It hooks up to the old analog speed
and depth transducers and outputs the data to the NMEA2000 network.
In typical Raymarine style, this isn't quite NMEA2000 compliant. The
standard says devices are required to connect to the backbone via
drop cable but this one needs to be wired in-line on the backbone
itself which makes the installation more hassle than it should be.
I installed this under the V berth so it is right next to the old
transducers. I had to splice a Raymarine proprietary connector onto
the backbone cable. The autopilot EV-1
is plugged into the iTC-5 as well as the backbone terminator.
Important to note is that the iTC-5 requires a Raymarine i70s
display unit in order to calibrate the sensor output, so I was
forced to get one of those as well.
AIS WatchMate XB-6000
Next on the backbone is a VesperMarine XB-6000 AIS transponder. This
receives AIS location data and sends it to the NMEA2000 network. It
also broadcasts my AIS data.
I installed a switch to control the AIS broadcast. Most of the time
I don't need to clutter the airwaves with my info. It is a nice
feature to have when the fog drops down and visibility goes to
The XB-6000 also has a really nice feature unrelated to its AIS
functionality - it gateways the NMEA network messages to USB.
This allows me to run OpenCPN on
a laptop and by plugging a USB cable to the XB-6000, I can get all
the NMEA data in OpenCPN. So cool!
ACU-100 Autopilot CPU
Next on the backbone is the Raymarine ACU-100 autopilot controller.
Installation is covered on the autopilot
The backbone goes up the pedestal guard to the navpods where the
The first display on line is the P70 autopilot control
Next is the i70s display. I had no initial plans to add this display
but it is required by the iTC-5 so here it is.
Garmin GNX Wind
This pairs with the wireless wind sensor at the top of the mast and
feeds wind data to the NMEA2000 network.
Garmin 7610 Chartplotter
The primary chart display.
my Catalina 270 page.