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Bottom Tracking of e97 MFD
08-26-17, 10:27 AM
Post: #1
Bottom Tracking of e97 MFD
We are also having problems with keeping the bottom tracking for an e97 MFD with SW version V19.03 with a transom mounted transducer (P58 I think). The attached file shows the bottom being tracked with the system automatically picking a depth range with a large school of fish on our spot with our boat anchored. It was expected that the fishfinder would know the difference between a natural hard bottom and a school of fish and not adjust the depth scale as a school of fish passes under the boat. I know we could manually fix the depth but thought there was another way to keep it in automatic mode as we might forget to change modes as we move the boat a few hundred feet to adjust for changes in current and wind while anchored.

When running at 30 MPH, we see short periodic times where the depth is being found and then not locked on the bottom. It seems to happen more often at 150 ft and 200 ft depths, maybe a depth transition point to auto track the bottom.

Thanks in advance for any advice
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08-29-17, 04:16 PM
Post: #2
RE: Bottom Tracking of e97 MFD
Welcome to the Raymarine Forum semnet,

Do the reported symptoms occur when the engine(s) are switched OFF and all other circuits / devices are switched OFF? If so, then the reported symptoms would appear to be caused by a fault within the e97 MFD's fishfinder circuity. Accordingly, it would be recommended that the MFD be sent to Raymarine’s Product Repair Center to be bench checked / serviced.
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09-16-17, 01:44 PM
Post: #3
RE: Bottom Tracking of e97 MFD
It is much more prevelent when the motors are running and we are at 30 mph, the track is lost almost entirely and there is a periodicity to the attempt to re-establish the bottom

When we are anchored, it seem to change the automatic depth scale when a large school of fish are present. So yes, it does happen when motors are off. Here is a screen shot of us anchored.
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