Hi, I have old transducers and gauges on board (ST40), but upgraded my chart plotter to a newer device that I came across at a very good price. The Garmin 840XS has neat sailing functions, but without wind and other data input it was no use. I was looking at upgrading the transducers for the new plotter, but also researching alternates that could allow my Seatalk 1 protocol to work through NMEA. I found some pricy options by both routes, but then came across Seayak on Ebay, sold out of Australia. I’m just posting here to let folks know this device exists, is low cost at $40, was simple to hook up, and works great. I have no affiliation... ( yes, I would have liked more accurate wind direction than I get from the Rotavecta, but I can live with it for the $1000+ saved by not buying new transducers..)