Raymarine e80

[Harmon]

What do transducers cost for these older units for the fish finder feature? Are they thru hull, in hull transom maybe

 

[joeyleggz]

To use the fishfinder feature on these units you need to have the DSM 300 module in addition to a transducer of your choice in Hull,through hull they come all different ways plenty of them on eBay as they do not make the DSM 300 anymore Used DSM 300 is a few hundred bucks and a new transducer is anywhere from 500 and up