Airmar XSonic P79 600W Inhull Depth Transducer — 50/200 kHz, No Hull Protrusions, Ideal for Trailerable Boats

The Airmar XSonic P79 is a precision, down-only depth transducer purpose-built for trailerable and lift-out boats. Designed to preserve your boat’s clean lines, it lives entirely in the hull and delivers dependable depth readings from the moment you cast off, regardless of speed or sea state. If you rely on accurate depth information for shallow bays, channels, or variable seabeds, the P79 keeps you confident and in control.

Why this in-hull design stands out

• No hull protrusions: Airmar’s in-hull footprint means no external skegs or probes to snag on ramps, docks, or debris. That means less drag, fewer maintenance concerns, and preserved exterior aesthetics on trailerable, planing-hull boats.
• Drill-free installation: A simple inside-hull mounting process with a hand-adjustable base lets you install or swap the transducer without cutting into the hull. It’s a straightforward upgrade that minimizes downtime and risk.
• Centerline mounting for optimal echoes: The P79 uses a centerline-aligned base designed to compensate for typical deadrise up to 22°, ensuring the beam shoots straight down for maximum echo returns and consistent depth data as you maneuver at speed.
• Self-contained, durable construction: The urethane housing with a plastic mounting base sits along the hull centerline and is filled with non-toxic antifreeze to optimize signal transmission through solid fiberglass. This design protects the electronics while delivering reliable readings in a range of conditions.
• Compact, trailer-friendly footprint: Specifically sized for boats up to 8 m (25 ft) with solid fiberglass hulls, including planing-hull powerboats, trailered boats, RIBs, and racing sailboats—providing a seamless integration without compromising hull aesthetics.
• Dual-frequency depth performance:
  • 50 kHz with a broad 45° beam delivers wide bottom coverage down to about 294 m (1,000 ft), ideal for deep-water operation and finding general depth trends quickly.
  • 200 kHz with a narrow 12° beam provides precise, near-shore readings down to about 180 m (600 ft), great for shallow water and structure-laden environments.
• Powerful, dependable readings: 600 W transducer power ensures strong echo returns, helping you maintain accurate depth information even in bottoms with variable textures or soft sediments.
• Easy upgrade with optional tuning: An optional 200 kHz model is available if your typical voyages demand more granular shallow-water depth sensitivity.

What problems the XSonic P79 solves

When you boat in shallow bays, channels, or debris-filled harbors, depth information needs to be accurate, fast, and stable. The P79 provides:

• Reliable down-only depth data at various speeds, so you’re never guessing how deep the water is beneath you.
• Consistent performance across variable seabeds, helping you navigate kelp beds, sandy bottoms, and rocky zones with confidence.
• Maintenance-free endurance thanks to its internal placement, robust materials, and antifreeze-filled housing—reducing hull wear and exterior snag risks.

Ideal use cases and who benefits most

• Trailerable and lift-out boats that prioritize a sleek hull line without external protrusions.
• Planing-hull powerboats and high-speed setups where minimizing drag matters as you launch, cruise, and race.
• RIBs and smaller sailboats that require dependable depth readings while maneuvering in coastal channels or shallow harbors.
• Boat owners who want drill-free upgrades, straightforward maintenance, and long-term reliability from a trusted marine electronics brand.

How the P79 compares in real-world scenarios

Compared with through-hull or external transducers, the XSonic P79 offers a cleaner exterior, easier seasonal removal for trailering, and a lower risk of damage from docking or ramp use. Its in-hull approach delivers reliable, down-only depth data across a range of speeds and water conditions, while the dual-frequency capability gives you a versatile mix of broad-depth coverage and detailed shallow-water readings—without needing to switch models or compromises on hull aesthetics.

Practical tips for getting the most from your transducer

• Position and align the base to maintain optimal vertical beam projection, especially if your hull experiences significant deadrise changes at different stations.
• Choose the 50 kHz/1,000 ft range for open-water cruising and the 200 kHz/600 ft range for nearshore channels and marinas.
• When using the 200 kHz option, plan field testing in typical shallow-water conditions to verify sensor sensitivity and echo clarity before critical passages.
• Regularly inspect the hull centerline mounting area for any signs of wear or impact from towing or launching activities to ensure repeatable echoes.

Why trust Airmar

Airmar is a recognized leader in marine sensing, delivering rugged, reliable transducers and sensors trusted by sailors, anglers, and commercial operators worldwide. The XSonic P79 embodies that heritage with a focus on clean hull integration, dependable depth data, and practical, field-proven performance for trailerable boats.

Specifications in brief

• : 600 W
• : 50 kHz (45° beam) for broad bottom coverage; 200 kHz (12° beam) for precise shallow readings
• : Deep-water coverage up to ~294 m (1,000 ft) at 50 kHz; shallow-water detail to ~180 m (600 ft) at 200 kHz
• : Drill-free, inside-hull installation with centerline base
• : In-hull installation for solid fiberglass hulls up to 8 m (25 ft); deadrise compatibility up to 22°
• : Urethane housing, plastic mounting base, filled with non-toxic antifreeze for signal transmission
• : Trailerable boats, lift-out boats, planing-hull craft, RIBs, and small racing sailboats

Upgrade your boat’s depth-measurement reliability without altering its lines. The Airmar XSonic P79 brings precise, fast, and dependable down-depth data to your trailerable or lift-out craft—ready to perform from the first launch to the longest coastal cruise.