I have a Lowrance system. They provide everything you need at 30-50 bucks a pop. Fluid level sensor for the tank, engine diagnostics (completely awesome), Fuel flow and all the reg stuff that you get w the standard unit. I have had zero issues. Use 2 LMF-400 gauges with it so my 28C-HD isn't crammed full of info that prevents me from seeing the bottom or the plotter. NMEA, LOVE IT!
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