CP370/B164 issue

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Eric,

Care must be taken to ensure that the corresponding transducer has been selected from the Transducer Setup menu of the Fishfinder application page/pane being viewed. Should the DSM be commanded to be reset, then this setting will be erased and the operator must then re-configure this setting.

The 1k transducers such as the B164 when driven by a 1kW sounder should be capable of sounding to at least 1000' at 50kHz when operating at trolling speeds. Should bottom occur when viewing 200kHz, then it would be recommended that the Channel be changed from to 50kHz.

We have a concern that the noise seen within the fishfinder plot may be due to electrical interference. It is recommended that the transducer cable's routing be inspected to ensure that it has not been routed/bundled with other cables. If not and should the problem persist, then it is recommended that the vessel's equipment, engines, and power circuits be switched OFF one by one until the noise within the fishfinder plot abates. Should all devices, engines, and circuits excluding those necessary for the MFD to display fishfinder imaging be switched OFF and should the problem persist, then please respond accordingly.