The Garmin GT51M-TH is a thru-hull transducer with a stainless steel stem built to handle the rigors of coastal and offshore fishing. It combines mid-band CHIRP traditional sonar with CHIRP DownVü and SideVü scanning sonar, delivering crisp fish arches, tight target separation, and detailed bottom and structure imagery both beneath and to either side of the hull. A built-in fast-response temperature sensor adds real-time water temp data, and the unit is designed for hull deadrises under 5 degrees.

Specifications:

• Model: GT51M-TH
• Mount Type: Thru-hull with stainless steel stem
• Connector: 12-pin
• DownVü/SideVü Power: 500 W per element
• DownVü/SideVü Operating Frequencies: CHIRP 260/455 kHz
• Traditional CHIRP Sonar Power: 600 W
• Traditional CHIRP Operating Frequencies: Mid-band CHIRP 80–160 kHz
• Temperature Sensor: Built-in fast-response
• Hull Deadrise Compatibility: Less than 5 degrees

In the Box:

• 12-pin transducer with stainless steel stem
• Fairing block
• Isolation plate and bushings
• Mounting hardware
• Installation instructions

Resources:

• Owner's Manual (PDF)

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