Keep the transducer inside a suitable fibreglass hull with the Garmin GT15M-IH. This 8-pin model uses mid-band CHIRP traditional sonar at 85–165 kHz to provide depth readings, with a 20-foot cable and support for hull deadrise angles from 0 to 25 degrees.
Plan the in-hull installation
The kit includes four plastic tanks, mounting hardware and documentation. Confirm your hull construction, deadrise and sounder compatibility before installation. Follow the included instructions carefully to avoid damaging your boat.
Specifications
Connection
8-pin
Sensor data
Depth
Cable length
20 ft
Supported hull deadrise
0–25 degrees
Traditional CHIRP frequency
Mid-band, 85–165 kHz
Stated transducer power
600 W
Beamwidth
24–13 degrees
Manufacturer-stated maximum depth
1,900 ft in freshwater
Part number
010-12402-00
The stated maximum depth is a manufacturer specification; actual performance depends on the installation and water conditions.
