What Furuno fishfinders are compatible with my existing Furno 50b-9 transducer, without adding an interface box? I have an old fcv271 I'd like to replace without hauling the boat and installing a new transducer.
Barkdee,
Yes there are other options but you will need to use the MB-1100 matching box. If you use the matching box you could use the GP-1870F or the FCV-587. These are both dual frequency units but since you only have a 50Khz transducer you will only have the low frequency available.