Sonda GT51M-TH - průchozí CHIRP/ClearVü/SideVü

The Garmin GT51M-TH transducer is a through-hull transducer designed for permanent and robust installation on your vessel's hull. It provides consistent sonar performance without interference, unlike transom-mounted transducers which can be affected by turbulence. Its through-hull installation ensures better signal quality by avoiding air bubbles and disturbances, which is essential for accurate readings.

The choice of location is crucial to optimize the performance of the GT51M-TH transducer. Here are the guidelines:

Outboard and sterndrive vessels: Mount the transducer in front of and close to the engine(s).Inboard vessels: Mount it in front and away from the propeller and propeller shaft.Catamarans: Installation must be done in front of the first chines.Long keel hulls: The transducer must be mounted slightly angled toward the bow, parallel to the centerline.Fin keel hulls: Position it 25 cm to 75 cm (10 to 30 in.) in front of the keel and no more than 10 cm (4 in.) from the centerline.Displacement hulls: Install it about one-third of the waterline length from the bow, and between 150 mm and 300 mm (6 to 12 in.) to the side of the centerline.In all cases, the transducer must be mounted parallel to the fore-aft axis of your vessel and in an area of clean water, i.e., non-turbulent. Avoid placing it behind planking, frames, fittings, water intakes or outlets, or anything that could create air bubbles or turbulence. It must also not be in the path of the propeller.

Using a fairing block is recommended if the deadrise angle of your hull at the mounting location exceeds 5°. The fairing block allows the transducer to be positioned parallel to the waterline, significantly improving the accuracy of sonar readings. To determine if a fairing block is necessary, you must measure the deadrise angle at the exact installation location. The block can be cut to match your hull’s deadrise angle, with a maximum cut angle of 25°.

Yes, it is imperative to update the software of your Garmin chartplotter when you install the GT51M-TH transducer. This update ensures compatibility and optimal performance between the transducer and your navigation device. You can find instructions for the software update in the Garmin chartplotter user manual.

The Garmin GT51M-TH transducer is designed to be installed on different types of hulls, including:

Fiberglass hulls (with or without core).Metal hulls.However, the installation process and specific tools may vary depending on the material and structure of your hull. Detailed instructions are provided for preparing each type of hull (fiberglass with core, without core, and metal) to ensure correct and secure installation. It is important to consult the installation manual for specifics related to your hull type.

To ensure perfect watertightness and prevent any water infiltration after installing the GT51M-TH transducer, you must apply marine sealant properly. Key points:

Apply marine sealant around the base of the transducer rod and the anti-rotation bolts before inserting them into the hull. If using a fairing block, also apply marine sealant to the side of the block that will be in contact with the hull’s exterior. Similarly, apply marine sealant to the side of the backing block that will be in contact with the hull’s interior. After tightening all nuts, remove any excess sealant from the exterior of the fairing block and hull before it hardens. This ensures smooth water flow over the transducer. It is critical to use a flexible, fast-curing marine sealant specifically designed for underwater use.