Lowrance S3100H Sonar Module [000-15918-002]S3100 Sonar Module The compact S3100H sonar module takes your fishing to the next level, with a wealth of powerful fishing features packed into one small but intelligent box. The S3100H brings heave compensated Active Imaging HD to select Simrad & Lowrance displays for next level fishing in all conditions. Experience superior underwater clarity and a FishReveal view on SideScan, so youll never miss another fish. Add heave compensation Fish with a