So I just got my transducer installed, I messed with the settings but I never get to get fish arches like I want. All I ever get is blobs and I thought these transducers were supposed to separate targets even as small as bait fish. I took it out to the islands for cod yesterday and nothing. I installed the update this morning and took it out in the harvor and still showing blobs. Is it that this certain Chirp Transducer only shows blobs and not arches? Im pretty disappointed with my purchase and need some help.