The Garmin GT20-TM is a transom-mount transducer with a 4-pin connector that adds sonar imaging to a compatible Garmin display.

• Traditional CHIRP HD-ID sonar sweeps a range of frequencies to produce clear returns of fish and structure below the boat
• CHIRP DownVü scanning sonar gives a detailed, picture-like view of the bottom directly beneath the hull
• Operates at 77 and 200 kHz in CHIRP DownVü mode
• Rated at 500 watts of power for sonar output
• Mounts on the transom for installation without drilling through the hull

Available through Mirage Fish Finder, the GT20-TM brings traditional CHIRP and DownVü scanning sonar to a compatible Garmin fish finder.