I was just watching a tutorial on Lowrances You Tube page called “Lowrance Live Basic Sonar Interpretation. At 28:07 you can clearly see that he’s using a structurescan 3D transducer (S3D-63.1.273). Now check out the frequency he’s scanning at.... Looks like 800 khz might be coming to the 3D module and transducer!! Am I seeing this correctly?