Join Date: Jul 2000
Location: New Bern, NC
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This is an upgrade you can do yourself as long as you are willing to invest the time. I changed from Raymarine ST50's to ST60's and linked the system with an E80 chartplotter, radar, Sirius weather(and audio), and Lifetag. The ST70 has NMEA 2000 capability but I don't think any of your other stuff interfaces with that. I did a Seatalk-ng network on my powerboat and it is just as easy although more expensive.
Having said that, I did have to change the through hulls when I did the conversion. The driving force for that was the speed transducer design includes a flap in the through hull that prevents a flood of water when removing the transducer. Worth it! makes it very easy and clean to pull the transducer when not sailing. Although you have to be on the hard, if you get the right spray for removing bedding compound, it is not that challenging.