Raymarine A66089, M260 1kW Transducer with In-Hull Mounting Kit. Want the performance of a High end transducer without drilling a hole in your boat? The A66089 1KW In-Hull Transducer w/ID and Mounting Tank is the right choice. The tank gets siliconed or glassed down to the hull and the transducer is submerged into a bath of mineral oil to help reduce false echoes. The powerhouse transducer has 14 elements and will not lose any power shooting through solid fiberglass hulls. Compatible with Raymarine S/E series and DSM30 and DSM300 fishfinders.