Lowrance Hook-7X Sonar Mid/High/Downscan Fishfinder Lowrance Hook-7X Sonar Mid/High/Downscan Fishfinder CHIRP sonar plus DownScan imaging combed to provide the best possible view beneath your boat Mid / High CHIRP transducer with Down Scan Advanced Signal Processing (ASP) reduces the need to manually adjust settings to see fish, structure and bottom detail more clearly TrackBack to review recorded sonar history including structure, transitions or fish targets, then pinpoint locations with a waypoint