Discover the power of precise underwater imaging with the Garmin GT30-TH stainless steel thru-hull transducer, designed specifically for boats with hull deadrises up to 25 degrees. This robust 12-pin scanning sonar unit excels in shallow waters, delivering crystal-clear views of fish, structure, and bottom contours both directly below and to the sides of your vessel. Whether you're chasing trophy bass in skinny water or mapping reefs for offshore adventures, its CHIRP ClearVü and SideVü technology paints a vivid picture that helps you pinpoint targets with confidence.

Why Choose the GT30-TH for Your Next Fishing Trip?

Built with a durable stainless steel stem, this transducer withstands the harsh marine environment while maintaining peak performance. The integrated fast-response temperature sensor provides real-time water temp data, essential for locating baitfish schools and understanding thermoclines. Anglers love how it consistently reveals separated fish arches, bait balls, and submerged hazards—even in murky or shallow conditions where traditional sonar falls short.

• Shallow Water Specialist: Optimized for deadrises from 0 to 25 degrees, ideal for planing hulls and flats boats.
• Exceptional Clarity: CHIRP frequencies at 455 kHz (425-485 kHz) and 800 kHz (790-850 kHz) offer razor-sharp resolution.
• Impressive Range: Reach depths up to 750 feet for ClearVü and 500 feet left/right for SideVü scanning.
• Powerhouse Performance: 500 watts per element (1,500 watts total) ensures strong signals in challenging conditions.

Key Technical Specifications

What's Included for Seamless Setup

Everything you need for a professional installation comes in the box: the transducer with stainless steel stem, fairing block for optimal water flow, isolation plate and bushings to reduce vibration, a 30-foot extension cable, plus all mounting hardware. Pro tip: Position the transducer forward of the prop and keel line for minimal interference, and ensure the fairing block matches your hull's deadrise angle for the best signal quality.

Real-World Benefits for Anglers

Imagine idling over a flat, spotting a school of redfish hugging a grass edge 100 feet to port— that's the GT30-TH in action. Its wide SideVü coverage (up to 500 feet per side) combined with narrow fore/aft beams gives you photo-like detail without the guesswork. The stainless steel construction resists corrosion, making it a long-term investment for serious offshore and inshore pursuits. Pair it with Garmin's GCV 10 black box for plug-and-play integration with compatible chartplotters.

Frequently Asked Questions