GT8HW-IH

The Garmin GT8HW-IH is an in-hull transducer (inside the hull), specifically designed for fiberglass hulls on bass boats. It provides reliable depth readings even at high speeds, thanks to traditional CHIRP technology with a wide beam (High Wide).

The GT8HW-IH transducer operates on a CHIRP High Wide frequency range, from 150 to 240 kHz. This technology provides clear underwater coverage and optimized target separation.

The GT8HW-IH transducer has an RMS (Root Mean Square) transmit power of 250 W. This power enables effective underwater detection.

The GT8HW-IH transducer can detect down to a maximum depth of 244 metres (800 feet) in fresh water. Actual performance may vary depending on water conditions.

The GT8HW-IH transducer offers a beam angle of 24° down to 16°. This angle ensures effective coverage of the seabed for improved detection.

No, the GT8HW-IH transducer is an in-hull model and typically does not include an integrated temperature or speed sensor.

The advantages of an in-hull transducer like the GT8HW-IH are multiple:

It does not require drilling the boat’s hull.It eliminates cavitation issues and risks of external damage.It creates no drag or turbulence in the water.It is ideal for high-speed boats or those frequently trailered.It can be installed even when the boat is in the water.

Yes, the GT8HW-IH transducer is particularly suited to fast boats or those frequently towed. Its in-hull installation eliminates cavitation issues and damage risks, which is a major advantage for these types of vessels.

The GT8HW-IH transducer is recommended for installation on solid fiberglass hulls only. It must be mounted on a fiberglass section with no air gap or core.

The GT8HW-IH transducer is not recommended for installation on metal hulls, wood hulls, or cored hulls.

The maximum hull deadrise angle for optimal installation of the GT8HW-IH transducer is 6 degrees. It is important to measure this angle at the planned installation location.

For installing the GT8HW-IH transducer, you will need the following tools:

80-grit sandpaper. Fast-curing marine epoxy. Rubbing alcohol for surface cleaning.

Before permanently installing the transducer, you can test the location by placing the transducer in a thin plastic bag filled with water, then placing it on the wet hull surface at the desired spot. Observe the transducer’s output on your chartplotter or depth sounder while the boat is in the water. If the results are unsatisfactory, try another location.

The epoxy used to install the GT8HW-IH transducer will fully cure in 24 hours. It is critical not to use the transducer before the epoxy has completely cured to ensure proper mounting and optimal performance.

For optimal performance, the GT8HW-IH transducer must be mounted in the bilge area, near the keel and the transom. It must be installed as flat as possible on a solid fiberglass section, and away from any protrusions or chines that could create turbulence.

To reduce signal interference, mount the transducer away from potential sources such as:

Electromagnetic interference (EMI): Keep the transducer cable away from other power cables, motors, audio equipment, or radar. Ensure proper grounding.
Turbulence interference: Avoid mounting behind the propeller, through-hull fittings, water intakes, or any hull irregularities that could agitate the water.
Acoustic interference: Maintain a minimum distance of 60 cm (24 in) when using multiple transducers, especially if they share the same frequency.

The GT8HW-IH transducer is compatible with many Garmin chartplotters in the ECHOMAP and GPSMAP series. For specific compatibility, please consult your Garmin device manual.

The Garmin GT8HW-IH transducer is fitted with an 8-pin connector, which simplifies integration with compatible Garmin systems.

Yes, for increased versatility, the GT8HW-IH transducer can be paired with a GT30-TM transducer (transom-mount) using an optional Garmin Y-cable (part number 010-12445-33). This setup allows combining different sonar readings.