Chuck,
Since its on the Terrova, they are somewhat distorted from the speed (or lack of) to begin with.. This is the same transducer Ive had on for 4 years, Im just starting to notice the fuzziness with fish. Its the same with both units, so Id guess its transducer based. Ive got a new Terrova 101 IPilot Link on order, so Im just going to leave it as it is for now, and then when I change the Terrova out, Ill install the 1198 transducer and see if it helps.