GARMIN FISHFINDER 100 Marine Boat Sounder Sonar Fish FinderGARMIN FISHFINDER 100 Marine Boat Sounder Sonar Fish Finder Note: Unit powers up but several vertical lines are missing. You will receive what you can see in the photos. **** The Fishfinder 100 has some big advantages over the competition. First, our exclusive See Thru technology allows the Fishfinder 100 to hear both weak and strong signals simultaneously, giving it tremendous dynamic range. The result is a display that is capable of showing strong