Figure out where all the fish are hiding with help from the Humminbird HELIX 7 CHIRP MEGA SI GPS G3 Fish Finder. The MEGA Side and Down imaging offer a clear view up to 125 feet below and to the side of the boat, and the SwitchFire Sonar reacts to turbulence and temperature for accurate sonar returns. The Dual Spectrum CHIRP system utilizes the Low Q CHIRP transducer to display structures where fish hide underwater in two viewing settings.