[CA] [CA11] 0.0ft reading

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum boudreaux77450,

Transducer failures are a relatively rare occurrence and it's hard to see how the reported failure with the horn could have had any impact upon a transducer. That said, it is certainly a good idea to verify that the power and ground cables be inspected from the equipment through any breaker panels / bus bars / terminals strips to the batteries and engine block (inboard or I/O engines) to ensure that the cables are in good shape, connector/terminals are free of corrosion, and all connections are tight. Please click here to view a FAQ addressing how a 50kHz/200kHz fishfinder transducer's depth elements may be tested. It would be recommended that any transducer be tested prior to replacement. Should the transducer be operational and the reported problem persist, the it would appear that the DSM may have suffered a failure. As Raymarine is no longer able to service DSM300/30/250 fishfinder sounder modules, a failure of one of these fishfinder sounder modules would necessitate upgrading the system or searching for a second hand replacement for those using it in conjunction with a C-Series Classic MFD.