GT15M-THF 12° – gegnsætt sonarþráður með CHIRP og meðal tíðni

Yes, the Garmin GT15M-THF transducer is made of stainless steel and is compatible with a wide range of hull materials, including fiberglass, wood, composites, aluminum, and steel. Note that for aluminum or steel hulls, the included galvanic isolation components must be installed to prevent corrosion.

The Garmin GT15M-THF transducer is made of stainless steel, providing robustness and versatility for installation on various hull types.

Yes, galvanic isolation components are included and must be installed when the Garmin GT15M-THF transducer is mounted on an aluminum or steel hull. This is essential to prevent galvanic corrosion and ensure hull integrity. Installation without these components on metal hulls could lead to water ingress around the transducer.

The hole diameter to drill depends on the material of your hull:

For solid fiberglass or laminated fiberglass hulls, a 73 mm (2 7/8 in) hole is required.For metal hulls (aluminum or steel), a 75 mm (3 in) hole is necessary.It is important to follow the specific installation instructions for hull preparation based on its material.

Yes, it is mandatory to update the software of your Garmin chartplotter when installing the GT15M-THF transducer. You can find instructions for the software update in the owner’s manual of your chartplotter.

It is generally not recommended to cut or splice the transducer cable. Cutting the transducer cable, unless specifically required to connect it to a "black box" sonar unit needing bare-wire connections, may void your warranty. It is advised not to use the cable to lift or pull the transducer to prevent any damage.

To install the Garmin GT15M-THF transducer, you will need the following tools:

A drillA 3 mm (1/8 in) drill bitAn adjustable wrench suitable for nuts up to 75 mm (3 in)Marine sealant (flexible, fast-curing type, for below the waterline)Mild household detergent or rubbing alcoholSandpaperMasking tapeWaterproof electrical insulating tapeGrommets (optional)Water-based antifouling paint (optional)For fiberglass hulls, a 73 mm (2 7/8 in) hole saw and marine epoxy resin (for laminated fiberglass hulls) are required. For metal hulls, a file and a 75 mm (3 in) hole saw are required.

To prepare a fiberglass sandwich hull, it is critical to seal the core to prevent water infiltration. Follow these steps:

Drill a 3 mm (1/8 in) pilot hole from the outside.Apply masking tape around the hole on the outside to reduce gelcoat cracking.Use a 73 mm (2 7/8 in) hole saw to drill the transducer hole through the hull from the outside.From the inside, use a slightly larger hole saw to cut only the inner fiberglass skin and core, taking care not to cut the outer skin.Seal the exposed core inside the hull using fiberglass and epoxy resin or casting epoxy resin, following the specific instructions for each method to create a watertight joint and restore the correct hole diameter.

The size of the hole to drill depends on the material of your hull:

For a solid or laminated fiberglass hull, you must drill a 73 mm (2 7/8 in) hole.

For a metal hull (aluminum or steel), you must drill a 75 mm (3 in) hole.

For optimal performance, the transducer must be mounted in an area of clean, non-turbulent water. Here are some general considerations:

On outboard and sterndrive motorboats, install the transducer in front of and close to the motor(s). On inboard motorboats, mount it in front of and away from the propeller and propeller shaft. On stepped hulls, install it in front of the first step. Avoid mounting it behind strakes, reinforcements, fittings, water intakes or discharges, or anything that could create air bubbles or turbulence. The transducer must be parallel to the boat's fore-and-aft axis and must not be mounted where it could be struck during launching, hauling, or storage.

To ensure correct orientation and optimal alignment of the sonar beam with your boat's deadrise angle, once the transducer is inserted into the mounting hole and before fully tightening the hull nut, you must rotate it. The arrow on top of the transducer must point toward the keel of the boat. This orientation is critical so that the transducer's internal angle aligns properly with your vessel's deadrise angle.

Yes, to achieve the best possible performance and to avoid potential damage to the device or your boat, installation by a qualified marine installer is strongly recommended. Incorrect installation can lead to injury, damage, or suboptimal performance of the transducer.

The Garmin GT15M-THF transducer is made of stainless steel, making it compatible with a wide range of hull materials. It can be installed on boats with fiberglass, wood, composite, aluminum, or steel hulls.

Note that when installing on an aluminum or steel hull, you must absolutely install the included galvanic isolation components to prevent corrosion.

Deadrise angle is the measurement between a horizontal line and the hull’s outer surface at a given point. For optimal sonar performance, it is critical that the transducer’s angle matches the deadrise at the installation location as closely as possible.

The Garmin GT15M-THF transducer is a 12-degree model, specifically designed for deadrise angles ranging from 6 to 16 degrees. It is recommended to check the deadrise angle of your hull at the chosen installation point before drilling.

Yes, the Garmin GT15M-THF transducer can be installed on aluminum or steel hulls. As it is made of stainless steel, it is designed for this compatibility.

However, it is imperative to install the included galvanic isolation components when installing on an aluminum or steel hull. Failure to do so would result in galvanic corrosion that could cause water ingress around the transducer.

The Garmin GT15M-THF transducer is designed for seamless integration with Garmin chartplotter and fishfinder systems. To ensure compatibility and optimal performance, it is necessary to update the software of your Garmin chartplotter when installing this device. You can find the update instructions in your chartplotter's user manual.

The Garmin GT15M-THF transducer is made of stainless steel. This robust material provides high durability and broad compatibility with various hull types, including metal hulls.

To ensure the longevity and proper functioning of your transducer, please follow these precautions:

Operation: Always use the transducer when it is submerged in water. Operating it in air may cause damage due to overheating.Cleaning: Never use solvents such as white spirit, acetone, methyl ethyl ketone (MEK), or similar products, as they can permanently damage the transducer surface. Do not use an electric sander or high-pressure washer to clean it.Handling: Do not lift or pull the transducer by its cable to avoid damaging the cable and the transducer itself.

Unless you are connecting the transducer to a sonar housing that requires bare-wire connections, you must not cut or splice the transducer cable. Cutting the transducer cable outside of what is necessary for a bare-wire connection to a sonar housing may void your warranty.

The main differences between the GT15M-THF and GT12M-THF models lie in their construction material and compatibility with hull materials:

The GT15M-THF is made of stainless steel and is compatible with fiberglass, wood, composite, aluminum, and steel hulls. It includes galvanic isolation components for metal hulls.The GT12M-THF is made of brass and is only compatible with fiberglass, wood, or composite hulls. It must not be installed on aluminum or steel hulls, as this would cause galvanic corrosion.Both models share a 12-degree angle, suitable for deadrise angles between 6 and 16 degrees.