GT56UHD-TH gegnfararsonar – UHD ClearVü/SideVü

Yes, the Garmin GT56UHD-TH transducer is designed to be compatible with Garmin chartplotters. However, it is imperative to update your Garmin chartplotter's software when installing this transducer to ensure compatibility and optimal performance. Update instructions are typically found in your chartplotter's user manual on support.garmin.com.

Anti-rotation bolts are crucial for the safety and performance of the GT56UHD-TH depth sounder. They are supplied with the unit and must be installed to prevent the transducer from rotating when the boat is underway. Failure to install them could damage your vessel and compromise the reliability of sonar readings by altering the transducer's orientation.

Location choice is critical for optimal performance and must be done carefully. Key considerations:

Non-turbulent water: The transducer must be mounted in an area with clean water, free of air bubbles and turbulence caused by strakes, reinforcements, fittings, through-hull fittings, or water discharges.Distance from engine/propeller:Outboard and sterndrive boats: ahead of and close to the engine(s).Inboard boats: ahead of and well clear of the propeller and propeller shaft.Single-propeller boats: do not mount in the propeller wash to avoid cavitation.Double-propeller boats: if possible, between the propellers.Specific hull types:Planing hulls: ahead of the first chine.Long keel hulls: slightly angled toward the bow, parallel to the centerline.Fin keel hulls: 25 to 75 cm ahead of the keel and no more than 10 cm off the centerline.Displacement hulls: approximately 1/3 of the waterline length from the bow, and 150 to 300 mm off the centerline.Avoid impacts: Do not mount in an area where it could be struck during launching, beaching, or storage.The transducer must be mounted parallel to the fore-and-aft axis of your vessel.

A fairing block is an accessory that positions the transducer parallel to the waterline, improving the accuracy of sonar data. Measure the deadrise angle of your boat’s hull at the installation location. If this angle exceeds 5°, using a fairing block is recommended for optimal transducer mounting.

The hole dimensions to drill in the hull vary slightly depending on the hull type:

For the stem hole (central hole for the transducer stem):
Fiberglass hulls (with or without core): 25 mm (1 inch) diameter.
Metal hulls: 32 mm (1 1/4 inch) diameter.
For the anti-rotation bolt holes:
Fiberglass hulls (with or without core): 9 mm (3/8 inch) diameter.
Metal hulls: 13 mm (1/2 inch) diameter.
It is recommended to use the mounting template provided in the product box to mark the hole locations accurately.

The main advantage of a through-hull transducer like the Garmin GT56UHD-TH is its ability to provide optimal and reliable sonar readings. By being installed directly through the hull, it sits in clean, non-turbulent water, minimizing interference and ensuring clearer and more accurate sonar images. This is particularly beneficial for ultra-high-definition scanning functions.

For installing the GT56UHD-TH transducer, a flexible, fast-curing marine sealant specifically designed for below-waterline applications is recommended. This type of sealant ensures a strong and durable watertight seal between the transducer (or fairing block, if used) and your boat's hull, preventing water intrusion.