Description
Garmin GT21-TH Transducer | Boat Supply Store
For coastal and offshore fishermen requiring superior underwater detail, the Garmin GT21-TH S/S transducer provides a robust solution. It integrates 600W of Traditional CHIRP sonar for exceptional fish arch definition with 500W of CHIRP ClearV scanning sonar to clearly delineate structure below your vessel. Engineered with a durable stainless steel stem and designed for hull deadrises under 25 degrees, this transducer ensures reliable performance in demanding marine environments. Its built-in fast-response temperature sensor adds crucial environmental data for optimized fishing strategies.
Key Features
- Clear definition of structure below the boat with CHIRP ClearV scanning sonar
- Crisp fish arches and superior target separation from Traditional CHIRP sonar
- Durable stainless steel stem thru-hull mount for long-term reliability
- Fast-response built-in temperature sensor for real-time water temperature data
- Optimized for hull deadrises less than 25 degrees for effective mounting
- Powerful 600W traditional sonar for deep water penetration
- High-resolution 500W CHIRP ClearV sonar for detailed bottom imaging
- Comprehensive installation kit including fairing block and isolation plate
Specifications
| Product Specifications | |
|---|---|
| Traditional Sonar Power | 600W |
| CHIRP ClearV Sonar Power | 500W |
| Traditional Sonar Frequencies | 50/200 kHz |
| CHIRP ClearV Sonar Frequencies | 260/455 kHz |
| Mount Type | Thru-Hull |
| Hull Deadrise Compatibility | Less than 25 degrees |
| Temperature Sensor | Yes |
| Stem Material | Stainless Steel |
Who This Is For
Coastal and offshore fishermen seeking advanced sonar capabilities for identifying fish and underwater structures with a reliable thru-hull mount transducer. Ideal for anglers who demand clear imaging of bottom contours and baitfish schools.
How It Compares
| Feature | Garmin GT21-TH Transducer | Airmar TM260 |
|---|---|---|
| Traditional Sonar Power | 600W | 1000W |
| CHIRP ClearV/DownVü Power | 500W | null |
| Traditional Sonar Frequencies | 50/200 kHz | 50/200 kHz |
| CHIRP ClearV/DownVü Frequencies | 260/455 kHz | null |
| Scanning Sonar Type | ClearV | Traditional Only |
| Mount Type | Thru-Hull | Thru-Hull |
| Hull Deadrise Compatibility | Less than 25 degrees | null |
| Temperature Sensor | Yes | Yes |
Common Concerns Answered
Is professional installation required for the Garmin GT21-TH?
While professional installation is recommended due to the drilling required and the importance of proper hull sealing, experienced DIYers can install this transducer if they are comfortable with thru-hull installations and ensuring the correct hull deadrise angle is maintained for optimal performance.
Can this transducer perform well in all water depths?
The GT21-TH excels in providing clear structure definition and fish arches, particularly in its intended coastal and offshore environments. While it offers robust performance, specialized transducers might offer distinct advantages in extremely shallow or exceptionally deep waters for highly specific applications.
What if my boat's hull deadrise is greater than 25 degrees?
This transducer is specifically designed for hull deadrises less than 25 degrees to ensure proper water flow and optimal sonar beam targeting. If your hull deadrise exceeds this specification, the transducer's performance may be compromised, and an alternative mounting solution or transducer model might be necessary.
Frequently Asked Questions
What is the power output for the CHIRP ClearV and traditional sonar on the Garmin GT21-TH transducer?
The Garmin GT21-TH transducer offers 500W of power for its CHIRP ClearV scanning sonar and 600W of power for its traditional CHIRP sonar.
What hull deadrise angle is the Garmin GT21-TH transducer designed for?
The Garmin GT21-TH transducer is designed for optimal performance on hulls with deadrise angles of less than 25 degrees.
Does the Garmin GT21-TH transducer include a temperature sensor?
Yes, the Garmin GT21-TH transducer includes a built-in fast-response temperature sensor.
What frequencies does the CHIRP ClearV element operate on?
The CHIRP ClearV element on the Garmin GT21-TH operates on frequencies of 260 kHz and 455 kHz.
What frequencies does the traditional sonar element operate on?
The traditional sonar element on the Garmin GT21-TH operates on frequencies of 50 kHz and 200 kHz.
