The Garmin GT12M is a flush-mount bronze thru-hull transducer built for midsize fishing and cruising boats. Its mid-band CHIRP sonar delivers sharp fish arches, defined structure, and reliable bottom returns down to 800 feet in saltwater and 1,200 feet in freshwater — all through a durable bronze housing designed to minimize drag and maintain optimal beam orientation.

Specifications:

• Transducer Type: Mid-band CHIRP traditional sonar
• Frequency Range: 85–165 kHz (medium band)
• Power Output: 350 W
• Beamwidth: 24°–16°
• Maximum Depth: 800 ft saltwater / 1,200 ft freshwater
• Cable Length: 50 ft
• Sensing: Depth and temperature
• Connector: 8-pin
• Housing Material: Bronze
• Tilt Angle: 12° — accommodates hull deadrise angles from 8° to 15°
• Compatible Hull Materials: Fiberglass, composite, wood
• Auto-ID: Plug-and-play Garmin auto-identification technology

In the Box:

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

Resources:

• Installation Guide (PDF)