Airmar B164 1kW tilted element thru-hull transducers provide dual-frequency 50/200kHz sonar with depth and temperature sensing, featuring 12° tilted ceramic arrays for optimal vertical beam on medium deadrise hulls without fairing blocks. Bronze flush-mount housings (0.25" protrusion) offer trailer-friendly, hydrodynamic efficiency across Garmin, Furuno, Lowrance, and Raymarine systems for high-performance sportfishing.