Bottom Tracking of e97 MFD

[semnet]

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