The Garmin GT8HW-IH is an in-hull transducer built for fiberglass bass boats where transom mounting isn't practical or where cavitation at high speeds would compromise sonar performance. Requiring a flat hull section for mounting, it delivers reliable depth readings even at elevated speeds, and pairs with a GT30-TM transducer and adapter cable to add scanning capability at trolling speeds.

Specifications:

• Connector: 8-pin
• Mount type: In-hull (requires flat hull section on fiberglass hull)
• Sonar technology: High-wide CHIRP traditional sonar
• Frequency range: 150–240 kHz
• Power rating: 250 W
• Compatible with GT30-TM transducer (requires adapter cable) 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 which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.