Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz
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Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz Product Description
Upgrade your boating experience with the Garmin GT21-TM transom mount transducer, a powerhouse for serious anglers chasing fish in coastal waters or pushing offshore. This versatile unit combines high-performance traditional sonar with advanced ClearVü CHIRP scanning technology, delivering razor-sharp images of fish arches, bottom structure, and underwater terrain. Whether you're targeting trophy bass in shallow bays or scanning deep reefs for snapper, it paints a vivid picture beneath your hull, helping you locate and land more fish with confidence.
Built tough for real-world marine conditions, the GT21-TM mounts easily on your transom and integrates seamlessly with compatible Garmin chartplotters and fishfinders. Its fast-response temperature sensor keeps you informed on water conditions, letting you adjust tactics on the fly as surface temps shift with tides or weather.
Standout Features That Deliver Results
- Dual Sonar Powerhouse: Traditional CHIRP at 50/200 kHz (600W) for exceptional target separation and fish ID, paired with ClearVü CHIRP at 260/455 kHz (500W) for nearly photographic down and side views of structure.
- Deep Water Capability: Reach up to 1,500 feet with traditional sonar and 1,000 feet with ClearVü, ideal for everything from inshore flats to offshore canyons.
- Wide Coverage Beams: Traditional 40°/10° beamwidth captures broad areas efficiently; ClearVü offers precise 2.0° x 51° at 260 kHz and 1.4° x 29° at 455 kHz for detailed scans without losing bottom contact.
- Rugged Transom Design: Handles 0° to 70° deadrise/transom angles, with a 30-foot cable for flexible routing on most boats.
- Plug-and-Play 8-Pin Connection: Simplifies setup on Garmin marine displays, including GPSMAP, ECHO MAP, and STRIKER series.
Detailed Specifications at a Glance
| Category | Traditional Sonar | ClearVü CHIRP |
|---|---|---|
| Frequency | 50/200 kHz | 260 kHz (245-275 kHz) & 455 kHz (445-465 kHz) |
| Power | 600 W | 500 W |
| Beamwidth | 40°/10° | 2.0° x 51° @ 260 kHz / 1.4° x 29° @ 455 kHz |
| Max Depth | 1,500 ft | 1,000 ft |
| General Specs | Details |
|---|---|
| Sensors | Depth & Temperature |
| Pin Count | 8-pin |
| Cable Length | 30 ft |
| Transom Angle | 0° to 70° |
Why Anglers Swear by the GT21-TM
In the heat of a tournament or during a family fishing trip, clarity is king. Traditional sonar excels at marking schools of baitfish and gamefish with crisp arches, while ClearVü reveals hidden wrecks, drop-offs, and brush piles like a downward-facing spotlight. This combo reduces guesswork—spot a thermocline, track bait balls, or pinpoint that submerged log where lunkers lurk.
Perfect for bass boats, center consoles, and offshore rigs. Users report fewer missed strikes thanks to superior separation, even in murky water or heavy cover. The built-in temp sensor helps dial in lure choices, as species migrate with subtle changes.
Effortless Installation and Pro Tips
Mounting is straightforward on most hulls: Clean the transom, select a spot 1/3 from the keel to stern, and secure with included hardware. Angle the transducer parallel to the waterline at speed for optimal performance—test at planing speeds and adjust brackets as needed.
- Route the 30-ft cable away from electrical interference for clean signals.
- Use marine sealant on mounting screws to prevent leaks.
- Pair with high-definition Garmin units for split-screen views of traditional, ClearVü, and charts.
Regular maintenance like wiping salt residue and checking mounts keeps it performing like new season after season.
What's Included for Quick Setup
- GT21-TM 8-pin transom mount transducer
- Complete mounting hardware kit
- Detailed installation guide
Frequently Asked Questions
What makes ClearVü CHIRP different from traditional sonar?
ClearVü provides high-resolution, photo-like images directly below and beside your boat, revealing structure details that traditional sonar marks as arches. Together, they offer complete coverage for spotting fish and bottom contours.
Is the GT21-TM suitable for high-speed boating?
Yes, its transom mount design maintains bottom lock at planing speeds when properly adjusted, making it great for tournament bass boats or offshore runs up to 70 MPH.
What Garmin units is this transducer compatible with?
It connects via 8-pin to most Garmin marine chartplotters like GPSMAP, ECHOMAP UHD, and STRIKER series that support ClearVü and traditional CHIRP sonar.
How deep can it detect fish?
Traditional sonar reaches 1,500 feet for deep-water species; ClearVü scans to 1,000 feet, sufficient for most structure fishing in oceans or large lakes.
Does it measure water temperature?
Absolutely—a built-in fast-response sensor provides accurate surface water temp readings, crucial for locating active fish zones.
Can I install it myself on a fiberglass boat?
Most users do, with no hull drilling required. Follow the guide for bracket placement to ensure clear water flow and avoid cavitation.
What's the beamwidth for spotting bait schools?
The wide 40° beam at 50 kHz covers large areas for offshore bait balls, while narrower beams provide precision for individual targets.
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 100196200 Attributes
- Mounting Location: Transom Mount
- Number Of Pins: 8 Pin
- Depth: 1500 Feet For Traditional And 1000 Feet For ClearVü
- Power Rating: 600 Watt For Traditional And 500 Watt For ClearVü
- Frequency Range: 50/200 kHz For Traditional And 260/455 kHz For ClearVü
- Supported Angle: 0 To 70 Degree Transom Angle
- Cable Length: 30 Feet
Garmin 100196200 Features & Benefits
- Perfect For Coastal And Offshore Fishermen Who Want 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
- Transducer With Built-In Fast Response Temperature Sensor Has A Power Rating Of 500 Watt
- Provides An 8-Pin Transducer With Mounting Hardware And Installation Instructions
- Limited 2 Year Warranty
Garmin 100196200 Installation Instructions
Garmin 100196200 Warranties
GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz
Perfect for coastal and offshore fishermen who want traditional sonar and CHIRP ClearVü 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 CHIRP ClearVü element has a power rating of 500W and operating frequencies of 260/455 kHz. The traditional sonar has a power rating of 600 W and operating frequencies of 50/200 kHz. It also includes a built-in fast response temperature sensor.
GT21-TM includes an 8-pin transducer with mounting hardware and installation instructions. Follow the instructions carefully to avoid damaging your boat.
Gt21-Tm beam mounted sensor, traditional 600W, 50/200k Hz, Clear V Chirp 500W, 260 455k Hz, very suitable for coastal and offshore fishermen who want traditional sonar and Chirp.
Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz Related Products
Propspeed Foulfree Foul-Release Transducer CoatingFrequently Asked Questions (FAQ) About Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz
Who is the Garmin?How to describe Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz?
What is the power rating of the product?
How many pins exists in the connector of the product?
Speed feature included to the product?
How to mount or what is the mounting style of Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz?
This product can read the temprature?
What is the length of cable (feet)?
What is the imagining type of the product?
What is the length of cable?
Is this product supporting CHIRP and what's the type?
Who is the Garmin?
How to describe Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz?
What is the power rating of the product?
How many pins exists in the connector of the product?
Speed feature included to the product?
How to mount or what is the mounting style of Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz?
This product can read the temprature?
What is the length of cable (feet)?
What is the imagining type of the product?
What is the length of cable?
Is this product supporting CHIRP and what's the type?
Save $31 when you buy the Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz for only $128 from NVN Marine! Same day shipping before 3pm.
Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Garmin |
| Weight: |
2.84 lb |
| Temperature: |
Yes |
| Speed Included: |
No |
| Pins: |
8 |
| Mounting Style: |
Transom |
| Imagining: |
Standard/Down |
| Chirp: |
Non Traditional |
| Cable Length (Feet): |
30' |
| Product Manual: |
Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz User Reviews
Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHz Shipping & Return
| Shipping Weight: |
2.84 lb |
|---|---|
| Box Sizes: |
5.00 (h) x 6.00 (w) x 12.00 (l) |
| Cubic Feet: |
360.0 |
| Returnable: |
Yes |
| P65: |
Yes |
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