The Garmin GT12M Bronze Thru-Hull transducer brings mid-band CHIRP sonar to midsize fishing and cruising boats, producing sharp fish arches, detailed structure, and clear bottom composition readings in both fresh and salt water. A flush-mount bronze housing keeps hull drag to a minimum, while the 8-pin plug-and-play connector works with compatible Garmin chartplotters through auto-ID — the unit self-configures without manual sonar setup.

Specifications:

• Transducer Type: Mid-band CHIRP traditional sonar
• Frequency Range: 85–165 kHz (medium band)
• Power Output: 350 W
• Beamwidth: 16°–24°
• Maximum Depth: 800 ft saltwater / 1,200 ft freshwater
• Cable Length: 50 ft
• Sensor Capabilities: Depth and temperature
• Connector: 8-pin
• Housing Material: Bronze
• Installation Type: Thru-hull, flush mount
• Compatible Hull Materials: Fiberglass, composite, wood
• Supported Deadrise Angle: 0° version accommodates hull deadrise angles from 0° to 7°

In the Box:

• GT12M-THF transducer
• Jam nut
• Washer
• Documentation

Resources:

• Installation Guide (PDF)