Garmin P79 In-Hull Smart Transducer - NMEA 2000

Discover Reliable Depth Sensing for Your Vessel

Enhance your boating adventures with a transducer designed specifically for seamless integration into your hull. This in-hull model delivers precise depth readings directly to your marine network, keeping your focus on the water ahead rather than on cumbersome installations. Ideal for sailors, anglers, and cruisers who value clean aesthetics and dependable performance, it transmits data effortlessly without drilling through the hull exterior.

Built tough for marine environments, it handles the rigors of saltwater and freshwater outings while providing consistent sonar feedback. Whether you're navigating shallow bays or deeper offshore waters, this unit ensures you stay informed about underwater contours and hazards.

Standout Performance Characteristics

• Exceptional Depth Capability: Tracks depths up to 500 feet, perfect for coastal cruising and moderate offshore trips.
• Focused Beam Technology: Operates at 235 kHz with a narrow beam for sharp, targeted returns that cut through clutter.
• Flexible Mounting: Adjusts to hull deadrise angles from 0 to 22 degrees, fitting a wide range of boat designs without custom modifications.
• Network Ready: Plugs straight into NMEA 2000 systems for plug-and-play connectivity with compatible displays and multifunction units.
• Durable Construction: Plastic housing resists corrosion and withstands the marine lifestyle, backed by thoughtful engineering for longevity.
• Generous Reach: 20-foot cable gives installers flexibility in routing to your network backbone.

Streamlined Installation Insights

Installing an in-hull transducer means no external holes or thru-hull fittings that could invite leaks or drag. Position it in a spot with solid fiberglass—avoid cored hulls and keep thickness under 5/8 inch for optimal signal transmission. Mix the provided liquid epoxy carefully, bed the unit firmly against the inner hull surface, and let it cure fully before testing.

Pro tip: Choose a forward-facing location amidships, away from strakes, steps, or prop wash to minimize interference. Dry-fit first to confirm the adjustable angle aligns perfectly with your hull's contour. Once connected to your NMEA 2000 backbone, calibration is straightforward via your display's sonar menu.

Why Opt for In-Hull Over Other Mounts?

In-hull designs shine on trailered boats or those stored on davits, preserving hull integrity and reducing maintenance headaches. They eliminate exposed transducers vulnerable to impacts from debris or docks. While thru-hull options might offer broader coverage in some setups, this model's focused beam excels in depth-only applications where precision matters most.

Users report crystal-clear readings in varied conditions, from murky rivers to open ocean, making it a favorite for fishing boats targeting structure or cruisers plotting safe passages.

Real-World Applications and Tips

Anglers love how it pinpoints drop-offs and schools without disturbing the water's surface. Cruisers rely on it for anchoring confidence in unfamiliar anchorages. For best results, pair it with a quality display that supports NMEA 2000 sonar overlays—watch bottom structure come alive on your screen.

Maintenance is minimal: Wipe clean after use, inspect cable connections seasonally, and store dry during off-seasons. In colder climates, ensure the hull doesn't flex excessively under ice to protect the bond.