The Garmin GT21-TM is an 8-pin transom-mount transducer aimed at coastal and offshore anglers who want both traditional sonar and CHIRP ClearVü scanning.

• Delivers traditional sonar for reading depth and fish below the boat
• Adds CHIRP ClearVü scanning sonar for a more detailed, near-photographic view of structure beneath the hull
• Transom-mount design installs on the back of the boat
• 8-pin connector for compatible Garmin units
• Suited to coastal and offshore fishing conditions

Available from Mirage Fish Finder, the GT21-TM brings traditional and CHIRP ClearVü sonar to a transom-mounted, 8-pin transducer.