C120 / cp370

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum cdevil,

Of the fishfinder sounder modules produced over the years, the C-Series Classic MFDs are exclusively compatible with the following legacy / retired fishfinder sounder modules:
- DSM250
- DSM30
- DSM300

As the above listed legacy / retired fishfinder sounder modules are no longer offered by Raymarine, Inc., it would be be necessary to replace the MFD with a current or more recent design. Alternatively, the Internet may be searched for a second hand instance of one of the above listed fishfinder sounder modules.