I fish a lot from my bow, primarily LM/SM bass, i already have a helix 9 si for my council, looking at a helix 7 g2n for bow. My trolling motor has the US2 universal 2d sonar built in, so I could buy just the head unit with no transducer and save some money, or i can go with the DI unit and mount the transducer on my terrova.
Is the DI better than 2D?
Will the external transducer have interference on trolling motor?
Look forward to hearing thoughts on the matter