Garmin GT23M-TM Plastic, TM Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin
Garmin GT23M-TM Plastic, TM Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin — Product description
Discover the power of advanced sonar imaging with the Garmin GT23M-TM transom mount transducer, designed specifically for serious coastal and offshore anglers. This robust plastic transducer combines mid-band CHIRP traditional sonar with CHIRP DownVü scanning sonar, delivering exceptional clarity in detecting fish targets and mapping underwater structures. Whether you're chasing trophy fish in shallow bays or scanning deep offshore waters, this 8-pin model provides reliable performance that enhances your boating and fishing adventures.
Engineered for seamless integration with compatible Garmin marine displays, the GT23M-TM stands out with its ability to produce sharp fish arches, superior target separation, and detailed views of the bottom contour. Anglers appreciate how it cuts through noise and clutter, revealing bait schools, wrecks, and drop-offs with precision that boosts catch rates.
Why Choose the Garmin GT23M-TM Transducer?
- Versatile Sonar Coverage: Mid-band CHIRP (80-160 kHz) for traditional 2D sonar excels at marking fish and structure up to 1,800 feet deep, while CHIRP DownVü (260/455 kHz) offers high-definition downward scanning to 1,000 feet, perfect for spotting fish directly beneath your vessel.
- High Power Output: 600W for traditional sonar and 500W for DownVü ensure strong signal penetration in varied water conditions, from murky coastal shallows to clear offshore depths.
- Easy Transom Installation: Supports transom angles from 0 to 70 degrees, with a 30-foot cable for flexible routing. Its streamlined design minimizes drag and maintains consistent bottom tracking at boat speeds up to 30 knots.
- Beam Width Optimization: Traditional beam of 24°/13° provides wide-to-narrow coverage, complemented by DownVü beams of 2.0° x 51° at 260 kHz and 1.4° x 29° at 455 kHz for detailed imagery without gaps.
- Durable Build: Tough plastic housing withstands harsh marine environments, backed by Garmin's commitment to reliability for long-term use on the water.
Technical Specifications at a Glance
| Specification | Details |
|---|---|
| Frequencies | Traditional CHIRP: 80-160 kHz DownVü CHIRP: 245-275 kHz & 445-465 kHz |
| Maximum Depth | Traditional: 1,800 ft DownVü: 1,000 ft |
| Transmit Power | Traditional: 600W DownVü: 500W |
| Beam Width | Traditional: 24°/13° DownVü: 2.0°x51° @260 kHz, 1.4°x29° @455 kHz |
| Connector & Cable | 8-pin, 30 ft cable |
| Mounting | Transom mount (0-70° angle) |
Pro Tips for Optimal Installation and Performance
Mount the transducer on the transom at the hull's lowest point, ensuring it's 1/8 to 1/4 inch below the hull bottom for best water flow. Keep it clear of strakes, trim tabs, or prop wash to avoid interference. Secure the bracket firmly with provided hardware, route the cable away from electrical noise sources, and test at various speeds to fine-tune jack plate height if needed. This setup maximizes sonar accuracy, helping you locate fish faster on every trip.
Pair it with Garmin units supporting CHIRP and DownVü for full potential—think crystal-clear separation of individual fish in schools or precise contour mapping for trolling paths.
What's Included
- GT23M-TM transducer
- Transom mount bracket
- Mounting hardware kit
- Documentation and instructions
Frequently Asked Questions
What type of boats is the Garmin GT23M-TM best suited for?
It's ideal for planing hulls like bass boats, center consoles, and offshore fishing vessels up to 30 feet, where transom mounting provides stable, high-speed performance.
Does this transducer support temperature sensing?
Yes, it includes a built-in temperature sensor for monitoring water conditions alongside depth and fish data.
How does CHIRP differ from traditional sonar on this model?
CHIRP sweeps across a range of frequencies (80-160 kHz here), offering better resolution, target separation, and depth penetration than fixed single-frequency sonar.
Can I use the GT23M-TM at high boat speeds?
Absolutely—it maintains clear bottom lock and fish detection up to 30+ knots when properly installed and adjusted.
Is this transducer compatible with all Garmin fishfinders?
It works with most Garmin chartplotters and sounders that support 8-pin transducers and CHIRP/DownVü features, like newer GPSMAP and ECHOMAP series.
What's the warranty coverage for this product?
Garmin offers a limited 2-year warranty, covering defects in materials and workmanship under normal use.
Real-World Fishing Advantages
Offshore anglers report using the GT23M-TM to pinpoint wrecks teeming with snapper or track pelagic species like tuna along bait balls. Inshore, its DownVü mode reveals crabs, flounder, and structure in seconds, saving time scouting spots. Combine with Garmin's LiveScope or SideVü for a complete ecosystem, but even standalone, it transforms your screen into a fish-finding powerhouse.
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 101240400 Attributes
- Mounting Location: Transom 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: 85-165 kHz Mid CHIRP Operating Frequency
- Supported Angle: 0 To 70 Degree Transom Angle
- Cable Length: 30 Feet
Garmin 101240400 Features & Benefits
- Perfect For Coastal And Offshore Anglers Who Want CHIRP Traditional Sonar And CHIRP ClearVu Scanning Sonar
- Transom 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 101240400 Installation Instructions
Garmin 101240400 Warranties
GT23M-TM Plastic, TM Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin
GT23M-TM transducer is perfect for coastal and offshore fishermen who want CHIRP traditional sonar and CHIRP DownVü scanning sonar. This transom 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 DownVü (260/455 kHz) element has a power rating of 500 W.
For installation, follow the included instructions carefully to avoid damaging your boat.
This beam-mounted transducer always displays a clear, crisp fish bow, excellent target separation, and a clear definition of the structure under the ship. 8 ...
SKU: NVN-58962
MPN: 010-12404-00
UPC: 753759148591
Technical specifications
| Brand | Garmin |
| Model | Garmin GT23M-TM Plastic, TM Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin |
| SKU / MFR# | 58962 |
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