I sent my Signet depth display in to their sevice dept a few years ago. Signet said the display was ok and sold me a new transducer with cable. After I determined I could not get the old transducer out of the haul,their tech suggested installing the new inside on the haul. I had been told inside installation would not work,but my wife came up with the idea of testing the transducer while in a bag of water, on different spots on the haul. We found a spot that gave us an accurate reading and mounted the trancducer in PVC that we used 5200 to seal. It has been working fine for three/four years.