I have a couple of transducers in the boat. One is a thru-hull Airmar DT800 smart transducer that is a part of the Sea Ray Navigator system and the other is an Airmar in-hull P79 transducer that is for the Raymarine DST300/E120 fishfinder. I have validated the DST300 is correctly operating. I'm working through some issues in the way the P79 transducer displays on the Raymarine E120. Right now it seems both of the transducers operate at 235 kHz (based upon Airmar literature) which may be a component of the display problems. My confusion is the Airmar tag on the DT800 says 170 kHz but all of the literature says 235 kHz..... Can anyone help me decode this?