The Garmin GT8HW-IH is an in-hull transducer designed for fiberglass bass boats where a transom mount isn't an option or where cavitation at speed would degrade sonar readings. It installs against a flat hull section and maintains reliable depth data even at high running speeds. Pair it with a GT30-TM transducer and the required adapter cable to gain scanning capability when you slow to trolling speeds.

Specifications:

• Connector: 8-pin
• Mount type: In-hull (requires a flat section on a fiberglass hull)
• Sonar technology: High-wide CHIRP traditional sonar
• Frequency range: 150–240 kHz
• Power rating: 250 W
• Compatible with the GT30-TM transducer (adapter cable required) for combined high-speed depth and trolling-speed scanning

Resources:

• Owner's Manual (PDF)
• Installation Guide (PDF)

⚠️ California Prop 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information visit P65Warnings.ca.gov.