Bionic Fish Finder Identify new fishing areas anywhere with this great tool for all recreational anglers. Boost your whole fishing experience with the Bionic Fish Finder, your perfect fishing partner. Steps: Carefully adjust the Sonar Sensor Float according to different water conditions before fishing, as it helps to maintain the effectiveness of the fish finder. After choosing your fishing spot, put the fish Sonar Sensor and the float into the water. It is important to keep the cable floating on or near the surface of the water. Put a float on the cable to prevent it from sinking.