The Garmin GT17M-THF SS delivers mid-band CHIRP sonar through a stainless steel thru-hull flush-mount housing, giving anglers and cruisers crisp fish arches, structure detail, and bottom readings down to 1,800 ft in saltwater or 2,400 ft in freshwater. The 12-degree tilt stem fits hulls with 8°–15° deadrise — no fairing block needed within the 0°–24° deadrise range — and Garmin Auto-ID means the unit is recognized automatically by compatible chartplotters the moment it's plugged in. Works across fiberglass, composite, steel, aluminum, and wood hull construction.

Specifications:

• Transducer Type: Mid-band CHIRP (80–165 kHz)
• Power Output: 1 kW
• Beamwidth: 9°–18°
• Maximum Depth: 1,800 ft saltwater / 2,400 ft freshwater
• RapidReturn™ Sonar Compatible: Yes
• Cable Length: 50 ft
• Sensing: Depth and temperature
• Connector: 8-pin
• Supported Hull Deadrise (12° stem): 8°–15°
• Housing Material: Stainless steel
• Installation Type: Thru-hull flush mount with 12° tilt stem
• Auto-ID: Yes — automatic transducer recognition on compatible Garmin chartplotters
• Compatible Hull Materials: Fiberglass, composite, steel, aluminum, wood

In the Box:

• GT17M-THF transducer
• Jam nut
• Spacer
• 2 washers
• 2 set screws
• Thread isolator
• Hull isolator
• Documentation