Sonda GT17M-THF 20° - průchozí CHIRP střední frekvence

The Garmin GT17M-THF 20-degree through-hull transducer is a transducer designed to provide reliable and stable CHIRP sonar performance. It is specifically suited for vessels with a deadrise angle between 17 and 24 degrees. Made of stainless steel, it ensures increased durability and is compatible with various hull materials.

The GT17M-THF 20-degree transducer is compatible with fiberglass, wood, composite, aluminum, and steel hulls. For aluminum or steel hulls, it is mandatory to use the included galvanic isolation components to prevent galvanic corrosion and water ingress around the transducer.

For optimal performance, the GT17M-THF transducer is designed for vessels with a deadrise angle between 17 and 24 degrees at the installation point. It is crucial to accurately measure the deadrise angle at the chosen location before drilling holes in the hull.

Yes, installation of the GT17M-THF 20-degree transducer by a qualified marine installer is strongly recommended to ensure optimal performance and avoid any risk of injury, damage to the device, or damage to the vessel. Incorrect installation may result in damage or injury.

The main tools required for installation include:

A drill with a 3 mm (1/8 in) bitA hole saw of 98 mm (3 7/8 in) for fiberglass hulls or 101 mm (4 in) for metal hullsA 4.5 mm (3/16 in) Allen keyAn adjustable wrench suitable for nuts up to 108 mm (4 1/4 in)Marine sealant (flexible fast-curing type, for below the waterline)Sandpaper and masking tapeAdditional items may be required depending on hull type.

For optimal performance, the transducer must be installed in an area of clean, non-turbulent water. Consider the following:

On outboard and stern-drive boats, mount it forward and close to the engine(s). On inboard boats, mount it forward and away from the propeller and propeller shaft. On stepped-hull boats, mount it forward of the first step. Avoid mounting it behind frames, stiffeners, fittings, water intakes or discharges, or anything that could create air bubbles or turbulence. The transducer must be parallel to the fore-aft axis of your vessel.

Yes, when installing the GT17M-THF 20° transducer on an aluminum or steel hull, it is mandatory to use the included galvanic isolation components. Failure to install them could result in galvanic corrosion and potential water ingress around the transducer. Ensure the hull isolator is flush with the inner hull surface.

Yes, you must update the software of your Garmin chartplotter when installing the GT17M-THF 20-degree transducer. For update instructions, refer to your chartplotter’s user manual.