Sonda GT23M-TH - transversal inoxidable CHIRP/ClearVü

The Garmin GT23M-TH transducer is a stainless steel through-hull transducer. It integrates two advanced sonar technologies:

Traditional CHIRP in mid-band: Operates on a frequency range of 80-160 kHz with a power of 600 W. CHIRP ClearVü: Operates on frequencies 260/455 kHz with a power of 500 W. It also enables precise monitoring of water depth and temperature.

The GT23M-TH transducer delivers 600 W for traditional CHIRP sonar in the mid-band (80–160 kHz) and 500 W for CHIRP ClearVü sonar (260/455 kHz).

The Garmin GT23M-TH sounder can reach a maximum depth of 549 meters using traditional CHIRP mode. In CHIRP ClearVü mode, the maximum depth is 305 meters.

The Garmin GT23M-TH transducer uses an 8-pin connector to connect to a compatible Garmin device.

The GT23M-TH transducer is made of stainless steel. This material is selected for its robustness and corrosion resistance, making it particularly suitable for demanding marine environments and ensuring a long service life.

The beam widths for the GT23M-TH transducer are as follows:

For the traditional CHIRP sonar: 24°/13°. For the CHIRP ClearVü sonar: 2.0°x51° at 260 kHz and 1.4°x29° at 455 kHz.

Yes, the Garmin GT23M-TH transducer can measure and provide water temperature data, in addition to depth sensing.

The GT23M-TH transducer is designed for coastal and offshore fishermen. Its through-hull mounting is compatible with fiberglass hulls (whether solid or foam-cored) and metal hulls.

Yes, it is necessary to update the software on your Garmin chartplotter when installing this depth sounder to ensure optimal compatibility and access to all features and best performance.

The Garmin GT23M-TH transducer is designed for thru-hull mounting, meaning it is installed by drilling through the boat's hull to secure it from the exterior to the interior.

To install the GT23M-TH transducer, you will need the following tools:

Drill and bits (3 mm, 9 mm, 13 mm)Open-end or adjustable wrenches (13 mm and up to 38 mm)Marine sealant (flexible, fast-curing, for below the waterline)Mild detergent or rubbing alcoholSandpaper and masking tapeWaterproof electrical tapeHole saw (25 mm or 32 mm depending on hull type)For fiberglass hulls with core: marine epoxy resin.If using a fairing block: jigsaw or table saw, rasp.

A fairing block is required if the deadrise angle of your hull at the mounting point exceeds 5°. It positions the transducer parallel to the waterline, which is critical for accurate sonar readings and optimal performance.

The fairing block supplied with the GT23M-TH transducer can compensate for a deadrise angle of up to 25°. This ensures optimal sonar beam orientation, even on hulls with a pronounced angle.

For optimal performance, the depth sounder must be installed in a clean, non-turbulent water area. Here are some general considerations:

Outboard and sterndrive boats: Mount the depth sounder in front of and near the engine(s).Inboard boats: Mount the depth sounder in front of and away from the propeller and propeller shaft.Displacement hull boats: Mount the depth sounder in front of the first chine.General positioning: The depth sounder must be mounted parallel to the bow-stern axis of your boat and avoid turbulence zones created by strakes, appendages, water intakes or discharges.

Yes, it is mandatory to install the transducer with one or more anti-rotation bolts (included). Failing to do so could cause the device to rotate when the boat is underway, potentially damaging your vessel.

For a fiberglass hull with core, preparation is crucial to prevent water intrusion. After drilling holes for the rod and anti-rotation bolts, the exposed core must be carefully cut out and sealed with high-quality marine epoxy resin. Allow the resin to cure completely before securing the transducer in the hull.

Yes, it is essential to apply marine sealant. You must apply it around the base of the transducer stem and the anti-rotation bolts. If a fairing block is used, sealant must also be applied to the side of the block in contact with the hull and to the side of the internal reinforcement block.

If you need to print the mounting template, it is crucial to ensure the scale is set to 100% in your printing software settings (for example, select "Actual Size" in Adobe Acrobat). After printing, use a ruler to measure at least one dimension line on the template to verify it is at the correct scale. However, it is recommended to use the template provided in the product box.

When drilling or cutting into the hull, several precautions must be taken:

Always check what is on the other side of the surface to avoid damaging the vessel or its equipment.Apply masking tape to the drilling area to help reduce cracks in the gelcoat.Always wear safety glasses, hearing protection, and a dust mask to prevent injury.

Yes, it is recommended that this equipment be installed by a qualified marine installer. This ensures proper installation, optimal performance of the transducer, and helps prevent any potential damage to the boat or the transducer.