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Garmin

010-12776-11

GT34UHD-THP Transom-Mount Sonar - UHD ClearVü Pair

The Garmin GT34UHD-THP is a pair of 500 W through-hull ultra high definition (UHD) transducers designed for Garmin chartplotters via the GCV™ 20 module. It delivers ClearVü imaging (760–880 kHz) up to 200 ft and SideVü imaging (1060–1170 kHz) with a range of 250 ft, integrating depth and temperature sensors for hull deadrise angles from 0° to 25°. This model represents an advanced solution for superior image clarity, positioning itself as a significant upgrade over standard ClearVü/SideVü transducers. The kit includes the transducer pair, anti-rotation bolts, rubber and nylon washers, a 35 mm hull nut, and M8 nuts.

Installation: Through-deck pair

Rear panel Transom Through-deck pair

Retail priceBenefit from the professional rate

$1,166.28 USD

$1,166.28 USD ~~$1,456.08 USD~~

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Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

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Technical specifications

Supported sonar technologies	CHIRP, ClearVü, SideVü
Fishfinder frequencies	800 kHz (760-880 kHz), 1200 kHz (1060-1170 kHz)
Peak power	500.0
Max depth reading	61.0
Sonar connector type	12-pin
Integrated temperature sensor	Yes
Compatible displays	Garmin ECHOMAP, GPSMAP
Bus compatibility	NMEA 2000
Wired network	NMEA 2000
Wireless connectivity	None
Mounting type	Travelling
Certifications	CE
Anti Rotation Bolt Drill Bit Size Metal Mm	13
Beam coverage angle	ClearVü: 0.74° x 46°, SideVü: 0.44° x 55°
CHIRP high frequency	760-880 kHz, 1060-1170 kHz
CHIRP low frequency	760
Epoxy Sealing Required	Yes
Fairing Block Max Cutting Angle Degrees	25
Fairing Block Required	Yes
Fishing type	Sea, Lake, River
Hull Nut Size Mm	35
Integrated speed sensor	No
Release year	2022.0
Sidevu Max Depth M	9.14
Sidevu Max Range Per Side M	38.1
Transducer Element Design	Three networks, one facing downward
Transducer Installation Guidance	Must be installed away from the propeller and sources of turbulence. For hulls with a deadrise angle greater than 25°, use a pair of transducers on each side of the keel. Avoid electromagnetic and acoustic interference. Maintain a spacing of at least 60 cm between multiple transducers.
User level	Expert
Washer Type Included	Rubber, Nylon

Detailed description

Designed for demanding sailors and anglers, the Garmin GT34UHD-THP is a pair of transom-mount ultra high-definition sonar transducers providing ClearVü and SideVü images with detailed clarity. Positioned as a cutting-edge solution for underwater detection, this model stands out from traditional transducers through its UHD technology, which optimizes the resolution of structures and fish, particularly when compared to Garmin’s standard ClearVü and SideVü versions.

Advanced Detection Capabilities

The Garmin GT34UHD-THP integrates three transducer arrays, including a downward-facing element, for enhanced power focus on targets. In Ultra High-Definition ClearVü mode, it operates at 0.8 MHz (800 kHz) with a CHIRP range of 760–880 kHz, reaching a maximum depth of 200 feet. The beam is 0.74° x 46°. For SideVü, the transducer uses a frequency of 1.2 MHz (1,200 kHz) with a CHIRP range of 1,060–1,170 kHz, offering a lateral range of 125 feet on each side (250 feet total) down to a depth of 30 feet, with a beam of 0.44° x 55°. This combination enables rapid and precise exploration of fishing zones.

Integration and Installation

This 500-watt transducer pair features a 12-pin connector and provides depth and temperature data. It is compatible with Garmin chartplotters via the GCV™ 20 sonar module. Designed for transom mounting, it supports hull deadrise angles from 0 to 25 degrees. The paired configuration is particularly suited to hulls with a deadrise angle greater than 5 degrees, where a single transducer’s SideVü signal could be obstructed by the keel. This ensures optimal coverage, even on more complex hulls, differentiating it from single-element transducers like the GT34UHD-TM for transom mounting.

Documentation

Type	Nom
	Mounting template - Recessed mounting template for GT34UHD-THP transducer
	Technical Document - GT34UHD-THP transducer placement guide
	Installation Notice - GT34UHD-THP Transducer: Thru-Hull Installation Instructions

Expert opinion

Pol CONIN

Digital Manager

« Garmin GT34UHD-THP fishfinder: through-hull UHD performance »

The Garmin GT34UHD-THP transducer is a strategic choice for sailors and anglers seeking high-precision underwater visualization. As a dual thru-hull transducer pair (THP), it is specifically designed to optimize the performance of ClearVü and SideVü technologies on hulls with a deadrise angle. On monohulls with a deadrise angle greater than 5 degrees, installing a pair allows bypassing the obstruction of the SideVü signal by the keel, ensuring complete and uninterrupted lateral coverage—a decisive advantage over a single thru-hull transducer.

Installing this transducer requires a professional approach. Drilling the hull for a thru-hull installation, especially on cored fiberglass hulls, demands meticulous sealing and preparation to prevent any water ingress. Using a fairing block is highly recommended if the deadrise angle exceeds 5 degrees to ensure that the sonar beams are parallel to the water surface, maximizing image clarity. While installation is more complex than a transom-mount setup, the benefits include reliability at high speeds and protection against external damage. This model targets users who prioritize image quality and discreet integration for long-term performance, connected via the GCV™ 20 module for extended compatibility with Garmin MFDs.

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GT34UHD-THP Transom-Mount Sonar - UHD ClearVü Pair

$1,166.28 USD

$1,166.28 USD ~~$1,456.08 USD~~

Frequently Asked Questions

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What is the Garmin GT34UHD-THP?

The Garmin GT34UHD-THP is a pair of through-hull ultra high-definition transducers designed for recreational boaters and anglers. It delivers ClearVü and SideVü images with exceptional clarity, enabling detailed detection of underwater structures and fish.

What is the main difference between the GT34UHD-THP and Garmin’s standard ClearVü/SideVü transducers?

The main difference lies in its Ultra High-Definition (UHD) technology, which optimizes image resolution. This delivers superior clarity and detail for structures and fish, especially when compared to Garmin’s standard ClearVü and SideVü versions.

What are the operating frequencies for the ClearVü UHD mode of this fishfinder?

In Ultra High-Definition ClearVü mode, the Garmin GT34UHD-THP operates at 0.8 MHz (800 kHz) with a CHIRP range of 760–880 kHz.

What is the maximum detection depth in ClearVü UHD mode?

The transducer can reach a maximum depth of 200 feet (approximately 61 meters) in Ultra High-Definition ClearVü mode.

What are the operating frequencies for SideVü UHD mode?

For SideVü mode, the transducer operates at a frequency of 1.2 MHz (1200 kHz) with a CHIRP range of 1060-1170 kHz.

What is the maximum SideVü UHD side range?

The SideVü mode provides a side range of 125 feet (approximately 38 meters) on each side, for a total of 250 feet (approximately 76 meters), down to a depth of 30 feet (approximately 9 meters).

What is the transmit power of the Garmin GT34UHD-THP transducer?

This transducer pair has a transmit power of 500 watts.

What type of connector is used on the Garmin GT34UHD-THP?

The Garmin GT34UHD-THP is equipped with a 12-pin connector for connection to your compatible Garmin device.

Is the Garmin GT34UHD-THP a thru-hull transducer or transom-mounted?

The Garmin GT34UHD-THP is a pair of thru-hull transducers (thru-hull pair - THP), meaning it is installed through a hole drilled in the boat's hull.

What are the basic tools required for installing the GT34UHD-THP?

Basic tools include a drill, wrenches, marine sealant (flexible, fast-curing, for below the waterline), sandpaper, masking tape, and waterproof electrical tape. Specific drill bits and hole saws are also required depending on the hull material (fiberglass or metal).

When is a fairing block necessary for installation?

A fairing block is required if the deadrise angle at the mounting location exceeds 5 degrees. It ensures the transducer is positioned parallel to the waterline for improved sonar accuracy.

How to determine the optimal location to install the depth sounder on my hull?

For optimal performance, the depth sounder must be mounted away from the propeller and its wash, seams, ribs, water inlets or outlets, and any other source of turbulence or interference (electromagnetic or acoustic). It must be in direct contact with undisturbed water.

Should I update the software on my chartplotter after installing this depth sounder?

Yes, you must update the software on your Garmin chartplotter when installing the GT34UHD-THP to ensure compatibility and optimal performance.

How to minimize electromagnetic interference (EMI) with the depth sounder signal?

To reduce EMI, ensure proper grounding of your sonar device and other equipment. Keep the depth sounder cable away from other power cables. If the depth sounder cable must cross a power cable, orient them at 90 degrees. Installing a ferrite bead on the transducer cable can also help.

Is the GT34UHD-THP compatible with fiberglass and metal hulls?

Yes, Garmin through-hull transducers, including the GT34UHD-THP, are designed to work with all hull materials, including fiberglass (with or without core) and metal. Specific hull preparation procedures apply for each material.

With which Garmin chartplotter models is the GT34UHD-THP compatible?

The GT34UHD-THP is compatible with Garmin chartplotters and depth sounders that support Ultra High-Definition ClearVü and SideVü technology. It is recommended to verify specific compatibility with your Garmin device model on the manufacturer's website or in your device's manual.

Is it possible to use antifouling paint on the GT34UHD-THP transducer?

Yes, it is possible to apply water-based antifouling paint to the transducer, but it is not mandatory. If you choose to apply it, ensure it is suitable for transducers and does not obstruct the active faces of the transducer.