I have a through hull transducer that was connected to a Raymarine fish finder (which the instrument no longer works). My handheld Garmin GPSMAP 60sx will show depth with the right input. Anyone know if there is a "black box" that will allow the connection of the transducer to the GPS?
I would guess that if the transducer connected to a Raymarine device that it is a Raymarice transducer? Regardless, it is conceivable that the transducer could plug into a device that could output NMEA. I suggest you call whoever made the transducer and ask. Its unlikely, but you never know.
Its also possible that you could get a new fish finder that outputs NMEA.
I understand not wanting to replace the transducer, since it is the thru hull type.