What makes the P79 in-hull transducer better than traditional puck types?

The P79 uses a liquid-filled base that bonds permanently to the hull, allowing sound waves to travel more efficiently. This setup, combined with its twist-lock design, provides stronger echoes and accurate depth up to 22-degree deadrise angles, outperforming solid pucks that suffer from hull interference.

Is the Raymarine P79 compatible with ST60 instruments?

Yes, it's specifically designed for seamless integration with Raymarine ST60 series depth sounders and compatible via SeaTalk networking for broader system use.

How do I adjust the P79 for my boat's hull deadrise?

The transducer features an adjustable mount. After installing the base, rotate the cap to align the beam vertically to the waterline, matching your hull's angle up to 22 degrees for optimal vertical orientation.

What frequency and power does the P79 operate at?

It runs at 200 kHz with 600W RMS power, delivering mid-performance depth sounding suitable for most recreational depths.

Can I install the P79 myself without drilling holes?

Absolutely—it's a true in-hull mount requiring no thru-hull penetration. Bond the base internally with sealant, fill with liquid, and twist-lock the transducer in place.

How do I maintain the liquid in the P79 base?

Check annually for degradation. Drain old liquid, rinse, and refill with the specified acoustic coupling fluid to maintain peak signal strength.

Will marine growth affect the P79's performance?

Since it's fully internal, it's shielded from fouling. Simply clean the internal face periodically to ensure clear transmission through the liquid.

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Raymarine P79, 600w In-Hull f/ST60Discover Superior Depth Sounding with the Raymarine P79 In Hull Transducer Sailors and powerboaters seeking reliable underwater data without the drag of thru hull installations swear by innovative designs like the P79. This 600W transducer mounts seamlessly inside the hull, capturing precise depth readings even on vessels with deadrise angles reaching 22 degrees. Its clever twist lock mechanism pairs a liquid filled basepermanently bonded to the

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Discover Superior Depth Sounding with the Raymarine P79 In-Hull Transducer

Sailors and powerboaters seeking reliable underwater data without the drag of thru-hull installations swear by innovative designs like the P79. This 600W transducer mounts seamlessly inside the hull, capturing precise depth readings even on vessels with deadrise angles reaching 22 degrees. Its clever twist-lock mechanism pairs a liquid-filled base—permanently bonded to the hull—with a detachable ceramic element, channeling sound waves efficiently for sharper echoes and fewer false readings compared to old-school puck styles.

Operating at 200 kHz, it delivers mid-range performance tailored for recreational and competitive boating. The plastic construction resists corrosion in saltwater environments, ensuring longevity without the maintenance headaches of metal alternatives. Imagine navigating shallow bays or racing in choppy conditions with confidence—knowing your depth data is spot-on, every time.

Effortless Installation for Any Hull Shape

Setting up the P79 starts with selecting a flat mounting spot amidships, away from strakes or through-hull fittings that could scatter sonar signals. Clean the hull interior thoroughly, then apply a marine-grade sealant around the base perimeter before securing it. Fill the base with the included oil-like liquid to optimize acoustic transmission—think of it as creating a perfect sonic pathway from transducer to water.

Twist the transducer cap into place, route the cable neatly through existing conduits, and connect to your display unit. Fine-tune the angle using the adjustable mount to align the beam perpendicular to the waterline, compensating for your boat's hull contour. Most installs wrap up in under an hour, minimizing downtime and preserving your vessel's watertight integrity—no holes drilled below the waterline required.

Tools needed: Sandpaper, sealant, screwdriver, cable ties.
Pro tip: Test in a bucket of water post-install to verify operation before launch.
Common pitfalls to avoid: Air bubbles in the liquid fill or misalignment causing beam tilt.

Unlock Peak Performance on the Water

At 600W RMS power, the P79 punches through thermoclines and sediment layers better than lower-wattage options, ideal for coastal cruising or offshore passages. The 200 kHz frequency strikes a balance—wide enough for bottom tracking in shallows, focused for clarity in deeper waters up to hundreds of feet. Boaters report crisp separation of fish arches from structure, even in murky conditions.

For ST60 series instruments, integration is plug-and-play, feeding data to multifunction displays or autopilots for enhanced navigation. Pair it with SeaTalk networks to share depth info across your helm stations. In real-world tests by avid sailors, it outperforms generic pucks by 20-30% in echo return strength, thanks to the liquid coupling that eliminates hull attenuation.

Keep It Running Like New Season After Season

Routine care is straightforward: Wipe the transducer face with a soft cloth and mild soap after every trip to remove algae or salt buildup. Annually, drain and refill the base liquid if you notice signal drop-off—fresh fluid restores acoustic efficiency. Store your boat with the transducer cap removed in dry conditions to prevent moisture ingress.

Watch for signs of trouble like erratic readings or total signal loss, often traced to cable damage or loose connections. With proper upkeep, these units routinely last 5-10 years, outpacing exposed thru-hull models battered by marine growth.

Perfect for Sailboats, Racers, and Cruisers

On lightweight racing hulls, the drag-free in-hull design shaves seconds off lap times while providing tactical depth intel for mark roundings. Cruising catamarans benefit from dual installs—one per hull—for averaged readings that smooth out wave-induced variances. Even trailerable boats appreciate the no-permanent-mod install, removable for off-season storage.

Whether dodging reefs in the tropics or plotting courses in foggy inlets, the P79 empowers skippers with data they can trust, blending rugged reliability with smart engineering.

Frequently Asked Questions

P79 In-hull

Our P79 in-hull transducer easily adjusts to hull deadrise angles up to 22°. This ensures that the beam is vertically oriented to receive echos resulting in accurate depth readings. Unlike traditional "puck" type transducers, our P79 consists of a base that is bonded to the hull and filled with liquid. The separate transducer then attaches to the base with a twist lock. The sound waves travel more efficiently though the liquid, giving the best possible performance.

Features:

Depth
200 kHz
600w RMS
Mid-performance
Plastic

P79 hull. Our P79 inboard transducer can be easily adjusted to a maximum blind angle of 22 degrees. This ensures that the beam is oriented vertically to receive the echo, resulting in...
SKU: NVN-17037
MPN: E26001-PZ
UPC: 723193260395

Raymarine P79, 600w In-Hull f/ST60

Name: Raymarine P79, 600w In-Hull f/ST60
Brand: www.midwoodautocraft.com
SKU: 56037372939
Price: 199.00 USD
Availability: InStock
Rating: 4.054 (196 reviews)