No, not yet. I am a little bit dreading the task of trying to track where the cable actually goes. The AIRMAR person did mention ferrites and I can see they are fairly inexpensive so it is obviously an option. One of the difficulties here is it is an intermittent problem. I think I need to take a day and follow the transducer cable to determine what other cables may be nearby. Unlike some electrical problems I don't know if there is a way to use continuity checks to help in the cable tracking - possibly someone can advise is there is a method on a transducer cable.