Garmin GT23M-TH Stainless Steel, TH Mount Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin
Garmin GT23M-TH Stainless Steel, TH Mount Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin — Product description
Unlock Crystal-Clear Underwater Views with the Garmin GT23M-TH
Imagine gliding through coastal waters or venturing offshore, where every fish arch and structure below your hull snaps into sharp focus. The Garmin GT23M-TH thru-hull transducer delivers exactly that, blending mid-band CHIRP traditional sonar with CHIRP ClearVü scanning sonar in a rugged stainless steel design built to withstand harsh marine environments. Coastal anglers and deep-sea pros alike rely on its superior target separation to spot fish with precision, revealing bait schools, wrecks, and drop-offs that traditional sonar might blur.
What sets this 8-pin powerhouse apart? Its dual-element setup combines wide-coverage traditional sonar for broad searches with high-definition ClearVü for detailed down-imaging, helping you pinpoint exactly where to drop your line. Whether you're chasing trophy tuna or mapping reefs, this transducer cuts through noise for reliable readings up to 1,800 feet deep on traditional CHIRP and 1,000 feet on ClearVü.
Key Specifications at a Glance
| Feature | Details |
|---|---|
| Mount Type | Thru-Hull with Stainless Steel Stem |
| Frequency | Traditional CHIRP: 80-160 kHz ClearVü CHIRP: 260/455 kHz |
| Power Output | Traditional: 600W ClearVü: 500W |
| Max Depth | Traditional: 1,800 ft ClearVü: 1,000 ft |
| Beam Width | Traditional: 24°/13° ClearVü: 2.0°x51° @260 kHz, 1.4°x29° @455 kHz |
| Deadrise Compatibility | 0° to 25° |
| Cable Length | 30 ft |
| Sensors | Depth and Water Temperature |
Why Serious Anglers Choose Thru-Hull Over Transom Mounts
Thru-hull transducers like the GT23M-TH mount directly through your boat's hull, positioning the elements closer to the waterline for cleaner signals and less interference from the hull or prop wash. This results in sharper images, especially at higher speeds—ideal for trolling or navigating rough seas. The stainless steel stem resists corrosion, ensuring long-term performance in saltwater.
Pair it with compatible Garmin chartplotters, and you'll access Quickdraw Contours for real-time mapping, plus SideVü integration on select units for a full 360° view. It's not just about seeing fish; it's about understanding the entire underwater ecosystem to outsmart your next catch.
Pro Tips for Seamless Installation
- Select a flat hull section forward of the prop for optimal beam spread and minimal turbulence.
- Use the included fairing block to match your boat's deadrise angle (up to 25°), reducing drag and air bubbles.
- Secure the isolation plate and bushings to prevent vibrations and leaks—always bed the transducer with marine sealant.
- Route the 30 ft cable away from electrical noise sources for interference-free sonar.
- Test at various speeds post-install to fine-tune settings for peak performance.
Backed by Garmin's reputation for marine reliability, this setup promises years of trouble-free operation.
Complete Kit for Easy Setup
- GT23M-TH transducer
- Stainless steel stem
- Fairing block
- Isolation plate and bushings
- Extension cable
- Mounting hardware
- Documentation
Frequently Asked Questions
What makes the Garmin GT23M-TH ideal for offshore fishing?
Its mid-band CHIRP traditional sonar excels at deep-water target separation up to 1,800 feet, while ClearVü provides detailed structure imaging, perfect for spotting wrecks and schools in challenging conditions.
Is this transducer compatible with my Garmin fishfinder?
Yes, the 8-pin connector works with most Garmin marine chartplotters and sounders that support CHIRP and ClearVü, like GPSMAP and echoMAP series.
How does CHIRP technology improve sonar performance?
CHIRP sweeps across frequencies (80-160 kHz here), delivering better resolution, range, and fish ID than fixed-frequency sonar, resulting in crisp arches and less clutter.
Can I install the GT23M-TH on a boat with a 20° deadrise hull?
Absolutely—the adjustable fairing block supports deadrise angles from 0° to 25°, ensuring a flush, hydrodynamic fit.
Does it measure water temperature?
Yes, the built-in temperature sensor provides accurate surface water readings, invaluable for targeting species like striped bass or salmon.
What's the difference between ClearVü and traditional sonar?
Traditional sonar offers 2D arches for depth and location; ClearVü adds photo-like down-imaging (260/455 kHz) for structure details, like seeing fish hiding in rocks.
How durable is the stainless steel stem?
Marine-grade stainless steel resists corrosion from saltwater, impacts, and electrolysis, making it tougher than plastic alternatives for long-term hull installations.
Garmin make products that are engineered on the inside for life on the outside. We bring GPS navigation and wearable technology to the automotive, aviation, marine, outdoor and fitness markets. We believe every day is an opportunity to innovate and a chance to beat yesterday. We offer products with essential utility, leading-edge technologies, compelling features, and exceptional ease-of-use to create clear differentiators our customers appreciate and desire.
Garmin 101240410 Attributes
- Mounting Location: Thru-Hull Mount
- Number Of Pins: 8 Pin
- Depth: 1800 Feet For Traditional And 1000 Feet For ClearVü
- Power Rating: 600 Watt For Traditional And 500 Watt For ClearVü
- Frequency Range: 80-160 kHz For Mid-Band CHIRP And 260/455 kHz For ClearVü
- Supported Angle: 0 To 25 Degree Deadrise
- Cable Length: 30 Feet
Garmin 101240410 Features & Benefits
- Perfect For Coastal And Offshore Fishermen Who Want CHIRP Traditional Sonar And CHIRP ClearVu Scanning Sonar With Stainless Steel Stem
- Thru-Hull Mounted Transducer Consistently Displays Clear And Crisp Fish Arches With Superior Target Separation As Well As Clear Definition Of Structure Below The Boat
- 8-Pin Transducer Features Mid-Band Chirp Traditional Sonar And Has A Power Rating Of 600 Watt
- Provides A Installation Instructions
- Limited 2 Year Warranty
Garmin 101240410 Installation Instructions
Garmin 101240410 Warranties
GT23M-TH Stainless Steel, TH Mount Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin
Perfect for coastal and offshore fishermen who want CHIRP traditional sonar and CHIRP ClearVü scanning sonar with a stainless steel stem, this thru-hull mount transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat.
The 8-pin transducer features mid-band CHIRP traditional sonar (80-160 kHz) and has a power rating of 600 W. The CHIRP ClearVü (260/455 kHz) element has a power rating of 500 W.
For installation, follow the included instructions carefully to avoid damaging your boat.
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SKU: NVN-58963
MPN: 010-12404-10
UPC: 753759148607
Technical specifications
| Brand | Garmin |
| Model | Garmin GT23M-TH Stainless Steel, TH Mount Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin |
| SKU / MFR# | 58963 |
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