Chartplotter and transducers
I am new to sailing and newer to chartplotters. I would love to get the gpsmap 521 or 527 but not sure on the transducer thing. Do I have to purchase and install a new one or will I be able to use my existing ones? I am not sure what I have at the moment but the boat has a raymarine depthsounder and knotlog with temp. Two through hull transducers. Anyway to make it work or does raymarine sell chartplotters that would work with my current setup? Thanks for any help with this matter.