Lowrance Hook-5 Mid/High PPP-18i Ice Machine Fishfinder Lowrance Hook-5 Mid/High PPP-18i Ice Machine Fishfinder Chirp sonar provide the best possible view beneath the ice Highly accurate built-in GPS antenna plus detailed U.S. Map featuring more than 3,000 lakes, rivers, and coastal contours to 1,000 feet Use your insight genesis custom maps created from your own sonar logs Track back to review recorded sonar history including structure, transitions or fish targets, then Pinpoint locations with a way point