The Garmin GT21-TM combines traditional sonar with CHIRP ClearVü scanning sonar in a single transom-mount package, making it a capable choice for coastal and offshore anglers. Its traditional element delivers sharp fish arches and strong target separation, while the ClearVü element produces high-definition imagery of structure directly beneath the hull. A built-in fast-response temperature sensor rounds out the feature set.

Specifications:

• Mount type: Transom mount
• Traditional sonar power: 600W
• Traditional sonar frequencies: 50/200 kHz
• CHIRP ClearVü sonar power: 500W
• CHIRP ClearVü frequencies: 260/455 kHz
• Built-in fast-response temperature sensor
• Connector: 8-pin
• Includes mounting hardware and installation instructions

In the Box:

• GT21-TM transducer (8-pin)
• Mounting hardware
• Installation instructions

Resources:

• Owner's Manual (PDF)

⚠️ California Prop 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.