Sonde GT51M-THP - paire traversante CHIRP/ClearVü/SideVü - visuel officiel Garmin 2

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Garmin

010-01966-11

GT51M-THP Transom-Mount Sonar - CHIRP/ClearVü/SideVü Pair

The Garmin GT51M-THP is a high-performance through-hull transducer designed for robust and reliable integration on various hull types. It delivers superior sonar signal quality for ClearVü and SideVü technologies thanks to its optimized position in clean water flow. Installation requires specific expertise and the use of marine sealant for a perfect watertight seal. Included: anti-rotation bolts, washers, nuts, and anti-seize compound.

Installation: Deck-through fitting

Rear panel Transom Deck-through fitting

Retail priceBenefit from the professional rate

1.410,01€

1.410,01€ ~~1.739,00€~~

Tax included. Shipping calculated at checkout.

In stock

Free pickup point shipping over €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

NMEA 2000 Load Equivalency Number (LEN)	1
Supported sonar technologies	CHIRP, ClearVü, SideVü, DownVü
Operating voltage	12
Fishfinder frequencies	CHIRP 42-65 kHz, CHIRP 130-210 kHz, CHIRP 260-410 kHz
Peak power	1000.0
Max depth reading	2300.0
Transducer material	Bronze
Sonar connector type	12-pin
Cable length	10.0
Product width	110
Integrated temperature sensor	Yes
Product height	50
Product depth	30
IP rating	IPX7
Bus compatibility	NMEA 2000
Wired network	NMEA 2000
Mounting type	Inboard
CHIRP high frequency	130-210
CHIRP low frequency	42-65
Fishing type	Sea, Lake, River, Trolling
Integrated speed sensor	No
User level	Expert

Detailed description

The Garmin GT51M-THP transom-mount sonar is a cutting-edge solution for Garmin CHIRP sonar systems. Designed for optimal installation, it delivers superior performance by eliminating interference and turbulence commonly encountered with transom-mount transducers. Its transom-mount design is particularly well-suited for fiberglass hulls (with or without core) and metal hulls, offering installation flexibility for a wide range of vessels.

Installation and acoustic performance

GT51M-THP installation is detailed to ensure perfect integration and long-term reliability. It requires precise drilling of holes for the main stem and anti-rotation bolts, essential for keeping the transducer in place even at high speeds, preventing potential hull damage. The use of a fairing block is recommended if the hull’s deadrise angle exceeds 5°, allowing the transducer to be positioned parallel to the waterline for enhanced sonar accuracy. This technical approach minimizes cavitation and ensures clean water flow over the transducer element, maximizing the efficiency of ClearVü, SideVü, and CHIRP technologies.

Robust design and system integration

The installation process emphasizes hull preparation, including sanding, cleaning, and applying a fast-curing, flexible marine sealant for flawless waterproofing below the waterline. Anti-rotation bolts and nut-secured mounting (with rubber and nylon washers) ensure robust mechanical stability. Unlike transom-mount transducers such as the GT20-TM or GT22HW-TM, the GT51M-THP’s transom-mount design provides a fixed and stable position, critical for acquiring detailed and consistent sonar data, particularly for precision bathymetry and SideVü underwater structure detection. It is imperative to update the Garmin display software during installation for optimal compatibility and performance.

Documentation

Type	Nom
	Mounting template - Mounting template for Garmin GT51M-THP transducer (EN)
	Installation manual - Garmin GT51M-THP thru-hull transducer installation instructions (EN)

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the Garmin GT51M-THP through-hull transducer »

The Garmin GT51M-THP transducer is a reliable integration solution for vessels requiring uncompromising sonar performance. Its through-hull design inherently outperforms transom-mount options for signal clarity, as it operates in undisturbed water flow, minimizing artifacts and maximizing the resolution of ClearVü and SideVü images. The most critical aspect of this transducer lies in its rigorous installation protocol, which is detailed to ensure not only the structural integrity of the hull but also the optimal acoustic performance of the device. Anti-rotation bolts are a key reliability feature at sea, preventing any rotation under stress and maintaining a constant beam orientation. Its adaptability to various hull types (fiberglass, metal) via an adjustable fairing block demonstrates its versatility. A qualified installer is essential for this implementation, ensuring the watertight integrity and precise alignment required to fully exploit the CHIRP capabilities of the GT51M. This is an investment for high-fidelity underwater data acquisition.

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GT51M-THP Transom-Mount Sonar - CHIRP/ClearVü/SideVü Pair

1.410,01€

1.410,01€ ~~1.739,00€~~

Frequently Asked Questions

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Which sonar technologies does the Garmin GT51M-THP transducer use?

The Garmin GT51M-THP transducer uses CHIRP medium, ClearVü, and SideVü sonar technologies. These technologies enable detailed detection of fish and underwater structures.

For which hull types is the GT51M-THP transducer suitable?

The GT51M-THP transducer is designed for installation on fiberglass hulls (with or without core) and metal hulls. Its through-hull design is optimized for these materials, providing installation flexibility for a wide range of vessels.

Why choose a through-hull transducer like the GT51M-THP over a transom-mount transducer?

The through-hull GT51M-THP transducer is recommended for superior performance as it eliminates interference and turbulence often encountered with transom-mount transducers. Its installation through the hull ensures a clean water flow over the transducer element, maximizing the efficiency of ClearVü, SideVü, and CHIRP (medium) technologies.

Is a fairing block required with the GT51M-THP transducer?

Yes, using a fairing block is recommended if the hull drift angle exceeds 5°. This allows the transducer to be positioned parallel to the waterline, ensuring improved sonar accuracy and minimizing cavitation.

What tools are required to install the Garmin GT51M-THP transducer?

To install the Garmin GT51M-THP transducer, you will need the following tools:

A drillBits of 3 mm (1/8 in), 9 mm (3/8 in) and 13 mm (1/2 in)A 13 mm (1/2 in) open-end or adjustable wrenchAn adjustable wrench suitable for nuts up to 38 mm (1 1/2 in)Marine sealant (flexible, fast-curing, for below the waterline)Mild household detergent or rubbing alcoholSandpaperMasking tapeWaterproof electrical tapeHole saws of 25 mm (1 in) or 32 mm (1 1/4 in) may be required depending on the hull type, along with a jigsaw or table saw and a file if a fairing block is used.

How to ensure the mounting template for the GT51M-THP transducer is at the correct scale?

After printing the mounting template, it is crucial to use a ruler to measure at least one dimension line to verify that the template has been printed at a 100% scale. It is recommended to use the template provided in the product box. If you print your own, ensure the scale option is set to 100% in the PDF print settings of your application.

Where should the GT51M-THP transducer be installed on an outboard or sterndrive motorboat?

On outboard and sterndrive motorboats, the GT51M-THP transducer must be mounted forward and close to the engine(s). It is essential to choose a location where the water is clean and non-turbulent, away from keels, struts, fittings, water intakes, or discharge outlets that could create air bubbles. The transducer must be in non-turbulent water for optimal performance.