Keep the transducer inside your fibreglass hull with the Garmin GT8HW-IH. This 8-pin model uses 145–230 kHz high-wide CHIRP traditional sonar for depth sensing, with a 20-foot cable. Installation requires a suitable flat hull section at less than 6 degrees.
Check the hull section before choosing
The supplied in-hull fitting supports an internal installation. Check the mounting location against Garmin’s instructions and confirm your sounder’s connection and sonar compatibility. The manufacturer-stated maximum depth is 800 feet in freshwater; actual performance depends on the installation and water conditions.
Specifications
| Connection |
8-pin |
| Sensor data |
Depth |
| Traditional sonar |
High-wide CHIRP, 145–230 kHz |
| Stated power |
250 W |
| Beamwidth |
24–16 degrees |
| Manufacturer-stated maximum depth |
800 ft in freshwater |
| Cable length |
20 ft |
| Hull installation requirement |
Inside a fibreglass hull, on a suitable flat section at less than 6 degrees |
| Part number |
010-12401-10 |
In the box
- GT8HW-IH transducer
- In-hull fitting
- Documentation
Optional scanning sonar pairing
Garmin describes using the GT8HW-IH alongside a separate GT30-TM transducer and adapter cable for a combined setup with scanning sonar. The GT30-TM and adapter cable are not included.
Follow the included installation instructions carefully to avoid damaging your boat.
