I just had the 4th Garmin Panoptix PS-22 Transducer Poop out on me. I have babied this last transducer since new. Even bought a new Plotter a 93sv UHD to run it on. I will pull the hours on the plotter but they will be more then the PS-22 because I have it rigged with it's own power switch. When not needed its powered down.
