Raymarine ITC-5 simplifies older ST instruments

I am always on the look out for ways to make my instruments and network more reliable and future-proof on Grace. One of the last instruments left that I hadn’t addressed was the Raymarine ST60 wind display. A while ago I came across the Raymarine ITC-5, which does not seem to have been marketed much as a solution to help with older instruments and newer networks. It seemed perfect to help increase the quality of my network while replacing some old pieces.

Grace came with Raymarine ST60 series wind and depth instruments which use the rather old Raymarine SeaTalk1 protocol. My original solution to bringing this data onto my NMEA 2000 network was to use a SeaTalk1 to SeaTalkNG converter (scroll down a bit) connected to a SeaTalkNG network, which was also cross connected to the rest of the NMEA 2000 network. I eventually replaced the dual thru-hull depth sensors with a single Maretron DST110, which is native NMEA 2000. That left the wind instrument at the top of the mast, and the ST60 wind display.

For more details on my network, please see the most up-to-date diagram here.

When I added the i70s displays recently, I simply took the ST60+ display part and hid it under the steering station. This worked for a while until it came unplugged at a rather inconvenient time, so I decided to install the ITC-5, which I had purchased a year or so ago.

The main unit is a beefy piece of plastic and comes with a SeaTalkNG cable, packet of connectors and screws, and a manual. I planned on removing the SeaTalk1 to SeaTalkNG converter, which was being used only for the ST60, and replace it with this, so the SeaTalkNG device port (the white one) would work perfectly.

One of the main reasons for installing this was to prevent the cables from coming unplugged from the back of the ST60. The ITC-5 has a very secure cover with clips, and a screw to keep it in place, as well as passthroughs for the wires coming in either side.

The front cover has a great big rubber gasket and angled entry points to help retain the wires as much as possible.

The main part of the unit has copper connectors that are clearly labeled and ready for connectors for Speed/Temp, Wind, Compass, Rudder, and Depth. There are several ways to connect Wind instruments depending on the model and type.

Each bank has a light which will indicate successful data transfer and connection. The unit itself has status lights similar to the SeaTalk1 converter right near the SeaTalkNG connector cable, and outside the cover so you can quickly see if data is flowing and power is on.

For my particular situation, I was only going to be using the Wind part. I removed the original ST60 and clipped off the older connectors. Using the ones included with the ITC-5, I put brand new connectors on each wire, and then began the contortions to get the unit in place.

In the photo above, I was testing the system and used the old connectors. You can also see the SeaTalk1 to SeaTalkNG converter in the upper right.

The install was pretty straightforwards. I didn’t have to configure anything on the ITC-5, simply plug in the connectors, put the cover on and route the cables, clip it shut, put the screw in, and done. The cable is tightly held by the rubber, and there is little chance the connectors will come undone again.

On my i70s I was able to choose to calibrate the ITC-5 wind settings by pointing the boat into the wind. No other adjustments were required. The wind data was showing up on the network perfectly.

I eventually plan on replacing the instrument at the top of the mast, but I have not found a good solution just yet. On Jammy I had a Maretron WSO100 ultrasonic sensor, but it was quite an ordeal to find space at the top of the mast for it. Other manufacturers have interesting concepts, but the most reliable seem to be similar to what I already have, but with NMEA 2000 cabling.

The ITC-5 allows me to get a bit more life out of the existing one with a much more reliable connection.

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6 thoughts on “Raymarine ITC-5 simplifies older ST instruments”

  1. Hi Steve: You have a great blog site, I visit it and Panbo weekly, if not every day to get ideas. I have a 1999 Beneteau with 19 year old Raymarine instruments. I’v e recently been having problems maintaining GPS and depth data on my RL70C chart plotter so I have ordered a Axiom Pro 9S, a Quantum 2 radar, and an i70s multifunction display. I have also ordered a SeaTalk1 to SeaTalkNG converter to, hopefully, get my ST6001 autopilot to play nice with the Axiom Pro. My speed, depth and wind instruments are all Autopilot ST 50s. In this regard, I have ordered the ITC-5 in hopes that it might convert the depth and wind instruments. My issue is that I have a DSM 300 a digital sounder module been my ST50 depth and my Airmar P319 transducer. While this could all work, I want to prepare for disaster.

    In the regard, I see that you have the Maretron DST110 transducer interfaced with your Axiom. You called it “quirky” in one of your posts? I currently have a small Maretron Devicenet backbone fo my Fusion stereo, Vesper Vision AIS and Maretron DSM410. I chose Maretron because of the quality of their cables and the desire to add their tank sensors and communication devices in the near future.

    My questions to you therefore are, am I on the right track with the SeaTalk1 to SeaTalkNG converter and the ITC-5? Also, should I buy the Maretron DST 110 or should I buy Raymarine options?

    Thanks in advance, Steve, for any advice you can send my way. Keep up the great work with the blog! It is a fantastic resource!

  2. Hi,

    Hi Steve, thank you for advise.

    This is not not exactly on a Raymarine instruments subject, but I would like to put one additional comment anyway.
    This device helped me enormously, when I went from Simrad IS12 instruments to B&G Triton2. IS 2 has build-in converter, but Triton is NMEA 2000 only. So i was able to hook up my old Airmar transducers to the this device and therefore to N2K bus. So now I have depth, speed, temperature on all B&G instruments and Garmin chartplotter.

    Thank you for your advise and blog.

  3. Hey Steve,
    Like your blog, seems along the lines of what I need to do. When I purchased my Bavaria, the previous owner included an I-70 wind instrument, in tacked and boxed. Now, I’m ready to connect it. A bit of of upgrade from the ST-60. You say, no issues but I see you made revisions at the mast on another blog. Raymarine, suggests ITC-5 w/ ST-70 model. I’m not mixing or matching my display is an E-127. The old ST-60 has a worn circle from what I guess was a loose dial. I opened the pod back and looks like the itc-5 magically connects old tech with newer.

  4. We have installed an itc-5 also and it is transferring wind and compass data to our MFD b
    ut the speed data is missing. The speed/temp led light is blinking. We put a new speed transducer in but still the itc-5 doesn’t recognize it. Any ideas on a fix for this?

  5. OK, a bit more specific info: the leds for speed/temp and depth go on solid when the unit is turned on. These are the only two inputs to the itc-5. Depth works and shows on our ES98 MFD. However after about five minutes, the speed /temp light changes to a slow blink. The itc-5 is selected on the mfd as source for speed. We have tried testing for transducer function by putting in a new speed transducer and also one that works from another boat. Neither works. We have also tried moving the speed transducer ground wire : on the speed/temp ground terminal, on the wind or rudder ground terminals, and unconnected.


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