I have a fiberglass flat bottom, Florida folk know it as a Stumpknocker, and am interested in upgrading for from an Eagle Fish ID 128 - it’s ok, laugh- mounted on TM to a DI that will operate on plane. The bottom is fiberglass and plywood. Will a shoot through transducer work?

Lord knows I appreciate those who understand the electronic stuff, but it is beyond this humble typist. Is there is something that will show depth, some conture, and maybe a fish?

The Eagle still works like it did when new, but is slower than Congress.

Any suggestions?