Confidently navigate in shallow or poorly charted waters with ForwardScan Sonar. The ForwardScan Long Stem Transducer features an extended stainless steel through-hull mount and specially designed fairing block to accommodate hulls up to 1 7/8" in thickness and up to 28 degree deadrise. ForwardScan provides forward-looking, two-dimensional sonar views of the bottom ahead of your boat. ForwardScan is a powerful defense against running aground, and an invaluable tool for locating secure sites to drop anchor. The ForwardScan transducer operates at 180kHz to reduce interference from traditional 200kHz sonar, and provides a maximum forward view of eight times your current depth, so you ll see up to 80 ft ahead in water 10 ft deep. Simple to install using a standard 2"dia. stainless steel thru-hull housing, the transducer plug can be removed for servicing with the boat in the water. Transmits and receives up to 10 times faster than previous forward-looking systems, and networks with compatible displays.