Catch the Big One! 🎯 Your ultimate fishing companion awaits. Ideal for both coastal and offshore fishing adventures. Designed for seamless transom mounting, making setup a breeze. Experience crystal-clear fish arches and superior target separation. Combines traditional sonar with advanced CHIRP ClearVü scanning technology. 500W power rating ensures reliable and detailed underwater imaging. Transom Mount Design 500W Power 260/455 kHz Frequencies The Garmin GT21-TM Chirp/DownVu Xdcr is a high-performance transom mount transducer designed for coastal and offshore fishermen. It features a powerful 500W CHIRP ClearVü scanning sonar with operating frequencies of 260/455 kHz, providing exceptional clarity and target separation for an enhanced fishing experience.