HDY
FOR YACHTS
Stop the fouling, lower your costs, and save time, all while increasing efficiency and performance.
Ultra-High-Power Ultrasonic Antifouling for Yachts and Large Vessels
The Hull Shield® HDY Series uses high-power ultrasonic energy to prevent biofouling on hulls, propellers, shafts, pod dries, jet drives, steering gear, sea chests, box coolers, and seawater pipework – all without coatings, chemicals, or mechanical intervention.
By operating continuously 24/7, HDY systems help yacht owners and operators reduce fuel consumption and emissions, improve vessel performance and handling, extend service intervals, and protect long-term asset value – even in aggressive fouling environments.
HULL SHIELD HDY SERIES
Hull Shield® HDY Series systems deliver unmatched ultrasonic antifouling performance for yachts, cruisers, and large recreational vessels.
Built around a more robust transducer design and commercial-grade architecture, the HDY Series provides more than 3x the power of our legacy HD systems and nearly 70% more power than our next-generation HDi Series – making it the most powerful recreational ultrasonic antifouling system on the market.
Designed for vessels over 60–70 feet, the HDY Series delivers comprehensive protection for hulls, running gear, and seawater systems, while requiring fewer transducers and enabling a simpler, more professional installation on larger, more complex yachts.
PERFORMANCE & COVERAGE
Highest recreational transducer output for maximum antifouling range and deep resonance effectiveness
Reduced transducer count on larger vessels, simplifying system layout and installation
Optimized for high-mass components including large shafts (3”+), larger IPS pod drives, and 30”+ propellers
Extends protection to seawater systems, including sea chests, manifolds, strainers, and pipework
Low thermal load, continuous-duty design engineered for demanding marine environments
PROFESSIONAL INSTALLATION FEATURES
Shielded signal cable – an industry first in the recreational market – for improved signal integrity and noise immunity
Custom-length installation using spool-supplied cable for precise routing without bulky extension joints
Compact, rugged control units engineered to withstand harsh marine conditions
Simplified configuration with optimized power distribution to reduce setup time and system complexity
COMMERCIAL-GRADE ARCHITECTURE & MODULAR RELIABILITY
The Hull Shield® HDY Series is built on the same commercial-series architecture used in Hull Shield’s industrial and workboat systems, delivering exceptional robustness, longevity, and operational confidence beyond typical recreational ultrasonic antifouling solutions.
Each HDY system utilizes a modular, multi-channel design, with power and control distributed across independent channels. This architecture enhances durability while providing inherent redundancy, ensuring continuous antifouling protection across the vessel.
Because each channel operates independently, overall system performance is maintained even when individual service is required. The remaining channels continue operating normally, preserving protection across the hull, running gear, and seawater systems. This service-friendly modularity aligns with professional shipyard, OEM, and fleet-level expectations.
PROTECTING YOUR ASSETS
Yacht owners, operators, and shipyards understand that reducing maintenance, downtime, and operating costs becomes increasingly critical as vessel size and complexity grow. The Hull Shield® HDY Series provides a powerful, non-intrusive layer of protection that safeguards critical underwater and seawater-system components while supporting long-term asset preservation.
Operating 24/7, HDY ultrasonic antifouling systems actively prevent biofouling from establishing on protected surfaces – without chemicals, coatings, or mechanical intervention.
HDY - PRIMARY YACHT APPLICATIONS
HDY systems are engineered to deliver high-energy ultrasonic protection across large, complex underwater structures where traditional antifouling methods fall short.
Hulls
Large hull structures are protected using a strategically distributed array of high-power ultrasonic transducers. Thanks to HDY’s industry-leading transducer output, fewer units are required to achieve full coverage on vessels over 60 feet, delivering broad, consistent protection across the submerged structure.
Shafts & Props
Biofouling accumulation on shafts and propellers negatively impacts fuel efficiency and propulsion performance. Hull Shield HDY systems can deliver ultrasonic energy directly through the shaft, protecting both the shaft and propeller simultaneously while maintaining clean, efficient running surfaces.
Pod-Drives
Fouled pod drives suffer reduced thrust, degraded steering response, and increased fuel consumption. HDY systems are highly effective at targeting high-mass pod structures, helping maintain optimal performance, maneuverability, and handling.
Jet-Drives
Internal fouling within jet drives can be difficult to access and costly to remediate. HDY ultrasonic antifouling can be deployed using non-intrusive installation methods, reducing fouling buildup and minimizing maintenance-related downtime.
Steering & Control Gear
Rudders, stabilizers, trim tabs, and other control surfaces benefit from targeted ultrasonic protection. Keeping these components free of marine growth improves hydrodynamic efficiency and results in more responsive and safer vessel handling.
Sea Chests & Box Coolers
Invasive biofouling in sea chests and box coolers restricts flow and reduces cooling efficiency. HDY systems excel at protecting these confined, high-risk areas, helping maintain cooling performance while reducing service intervals and unplanned maintenance.
Pipework & Valves
Biofouling can affect the flow rate and function of various types of pipework. Targeted ultrasound treatment is effective at reducing fouling in pipes and decreasing subsequent maintenance intervals and downtime.
By targeting both large external structures and confined internal systems, HDY delivers comprehensive antifouling protection across the entire underwater profile of the vessel — improving efficiency, reliability, and long-term asset value.
SUSTAINABLE, CONTINOUS PROTECTION
By preventing biofouling before it takes hold, Hull Shield® HDY systems help reduce fuel consumption, emissions, and reliance on traditional antifouling methods. When used alongside modern bottom paints, HDY systems extend coating life, reduce dry-docking frequency, and support more sustainable vessel operation – without introducing additional toxins into the marine environment.
APPLICATIONS
The HDY Series is ideally suited for:
Motor yachts, long-range cruisers, and large sailing yachts (60–150 ft+)
Vessels with large pod drives, large propellers & shafts, or complex hull geometries
Owners and captains seeking maximum antifouling protection with minimal maintenance
Shipyards and professional installers prioritizing clean, efficient system integration
COMPARITAVE POWER
| Series | Power per Transducer | Typical Use Case | Key Advantage |
| HD (Legacy) | Standard Output | 20–50 ft | Proven reliability |
| HDi (Next-Gen) | +100% Increase vs. HD | 30–80 ft | Intelligent control & optimization |
| HDY (High-Power) | +230% Increase vs. HD | 60–150 ft+ | Maximum antifouling performance |
HDY IS THE PINNACLE OF ULTRASONIC ANTIFOULING
The Hull Shield® HDY Series represents the pinnacle of ultrasonic antifouling for the recreational and yacht market – delivering commercial-grade power, broader coverage, cleaner installations, and true professional-level robustness.
Whether protecting the hull, running gear, or seawater systems, HDY systems provide the next level of clean, engineered for serious yacht owners, captains, installers, and shipyards who demand uncompromising performance.
HDY-10
Industrial Ultrasonic Antifouling
Control up to ten (10) transducers.
Includes 100m of signal cable.
POWER
DIMENSIONS
WEIGHT
50W (2.1A @ 24V)
11.24″H x 13.74″W x 5.72″D
9.54lbs (4.33kg)
HDY-8
Industrial Ultrasonic Antifouling
Control up to eight (8) transducers.
Includes 80m of signal cable.
POWER
DIMENSIONS
WEIGHT
40W (1.67A @ 24V)
11.24″H x 13.74″W x 5.72″D
9.04lbs (4.1kg)
HDY-6
Industrial Ultrasonic Antifouling
Control up to six (6) transducers.
Includes 60m of signal cable.
POWER
DIMENSIONS
WEIGHT
30W (1.25A @ 24V)
11.24″H x 13.74″W x 5.72″D
8.54lbs (3.87kg)
HDY-4
Industrial Ultrasonic Antifouling
Control up to four (4) transducers.
Includes 40m of signal cable.
POWER
DIMENSIONS
WEIGHT
20W (0.84A @ 24V)
9.04”H x 11.04″W x 3.72″D
6.17lbs (2.79kg)
HDY-3
Industrial Ultrasonic Antifouling
Control up to three (3) transducers.
Includes 30m of signal cable.
POWER
DIMENSIONS
WEIGHT
15W (0.63A @ 24V)
9.04”H x 11.04″W x 3.72″D
5.89lbs (2.79kg)
HDY-2
Industrial Ultrasonic Antifouling
Control up to two (2) transducers.
Includes 20m of signal cable.
POWER
DIMENSIONS
WEIGHT
10W (0.42A @ 24V)
7.04”H x 9.04”W x 5.22”D
5.67lbs (2.71kg)
HDY Series Technical Details
OPERATING CHARACTERISTICS
Maximum Input Voltage
Operating Voltage Range
Output Voltage Range (VAC)
Operating Temperature
32.0V
24.0V to 28.0V
230V to 280V (RMS)
-22F to 140F (-30C to 60C)
FREQUENCY & PULSE
Frequency Range
MAX Sustained Pulse Power
Peak Pulse Power (<1ms)
22,727 Hz to 41,666 Hz
72 Watts
100 Watts
RATINGS
Enclosure
Signal Connectors
Rocker Switch
Power/Auxiliary Cable
IP68, NEMA 6P,12; UL94 V-0; UL746C 5VA
IP67; IP68; UL94 V-0
IP67, RoHS-3
UL2464; VW-1; 80C; RoHS
Contact us today for more information.
Reach out to us with your project details. We will conduct a survey of your specific project requirements and can recommend an optimal configuration that will meet your needs.
Contact us through the form below or email. You can also send an email direct to info@hullshield.net. You can also call +1 410 999 0219 Monday to Friday 9am-5pm EST.