OK...New Helix MEGA G2N units has the Chirp on 2D Sonar correct....If you have the MEGA Transducer mounted to the Transom and an in-hull (shoot thru) transducer in the bilge both connected thru the MEGA Y Cable (MSIDB Y) how does the 2D actually use the Chirp function. If it splits the signal...all info from MEGA transducer like SI, DI, Temp, Etc...and 2D info from the Dual Beam in-hull transducer...how does it give you a reading with Chirp technology....or maybe I am just missing the whole thing...lol