Quote Originally Posted by Burkcarp1 View Post
Get a TM150 transducer and then it’s just a matter of moving
The transducer up or down a little. YouTube has videos on transducer placement.
Most good FF will mark fish at higher speeds but it's usually a matter of getting the transducer aimed correctly. I can see fish on my older HDS on plane but it's tough to tell a school of fish from interference sometimes. For the best resolution you just need a good FF that will utilize a CHIRP transducer. I think the Airmar P-66 I a good transom mount CHIRP unit.