Navico XSONIC P79 Adjustable 200/50kHz Plastic In-Hull Transducer - 9-Pin

Discover Superior Depth Performance with the P79 In-Hull Transducer

Boat owners seeking reliable depth readings without compromising hull integrity often turn to in-hull transducers like the P79. This adjustable plastic sensor excels in planing hull powerboats, trailered vessels, rigid inflatable boats (RIBs), and even racing sailboats. Its clever design eliminates the need for through-hull drilling in many setups, reducing labor and potential leak risks while delivering crisp sonar data across inshore waters.

What sets it apart is the innovative liquid-filled base that optimizes sound wave transmission. By bonding securely to the hull interior and allowing the transducer pod to twist-lock in place, it ensures the beam points straight down—crucial for accurate bottom tracking on vessels with varying deadrise angles up to 22 degrees. Anglers, cruisers, and racers alike appreciate how it handles choppy conditions without protrusions that could snag lines or damage the hull.

Key Technical Specs for Marine Enthusiasts

Dive into the specs that make this 600-watt powerhouse a go-to for dual-frequency operation:

• Frequencies: 50 kHz for wide-area coverage (45-degree beam) and 200 kHz for detailed close-range views (12-degree beam)
• Depth Capability: Reliable readings from shallow flats up to 1,200 feet, perfect for coastal explorations
• Hull Compatibility: Solid fiberglass up to 5/8-inch thick; adheres to aluminum hulls under 0.16 inches; skips cored bottoms to avoid signal distortion
• Deadrise Adjustment: Fine-tunes from 2 to 22 degrees, matching most outboard motorboats and sporty hulls
• Cable: 33-foot length provides flexible routing to your chartplotter or fishfinder
• Connector: Standard 9-pin for seamless integration with popular marine electronics

These attributes translate to fewer false readings and stronger signal returns, even as speeds climb during planing.

Effortless Installation and Hull-Friendly Design

Installing an in-hull transducer shouldn't feel like a shipyard overhaul. The P79 simplifies the process: clean the mounting spot inside the hull, apply the base with included adhesive, fill with the provided liquid, then secure the pod. No external holes mean less worry about warranties or structural integrity. It's especially forgiving on trailered boats where frequent launches demand durability.

Pro tip from seasoned installers: Position it forward of prop wash and away from strakes for the cleanest pulse. Test in a few inches of water post-install to verify vertical alignment—adjust if needed for peak performance. This setup shines on outboard-powered rigs, where space is tight and aesthetics matter.

Real-World Performance Across Boating Scenarios

In practice, the P79's dual beams adapt to your needs. Use the wider 50 kHz for scouting drop-offs or navigating murky bays, switching to 200 kHz when targeting structure or schools of fish hugging the bottom. Powerboat captains report consistent depth locks at 30+ knots, while sail racers value its low-profile mount that won't foul spinnaker sheets.

Compared to puck-style alternatives, the liquid coupling minimizes air bubble interference, yielding sharper fish arches and bottom detail. It's a smart upgrade for boats transitioning from portable sounders to fixed sonar systems, offering pro-level insight without the fuss.

Long-Term Reliability and Maintenance Essentials

Built tough from marine-grade plastic, this transducer withstands UV exposure and vibration. Routine checks involve inspecting the liquid fill for leaks and wiping the pod clean after saltwater sessions. Avoid high-pressure washes near the seal to preserve adhesion. With proper care, it delivers years of trouble-free service, making it a staple for weekend warriors and serious offshore adventurers alike.