Developed using Epirus’ scalable, solid-state energy-based platform, Leonidas H2O emits non-ionising radiation to disrupt the electronic components of its targets. This approach ensures safety around fuel, ammunition and personnel when used under appropriate conditions.
The system was tested during the U.S. Navy’s Advanced Naval Technology Exercise Coastal Trident (ANTX-CT), where it demonstrated strong performance against a range of real-world maritime threats. Trials included engagement with four commercially available boat engines, ranging from 40 to 90 horsepower, at various distances.
Despite strict testing conditions, including power reduction to less than half of its maximum output and limited waveform capabilities, Leonidas H2O successfully neutralised all targets. In fact, the system achieved effectiveness at what were described as record ranges, validating its operational potential.
The demonstration was coordinated by the Office of Technology at the Naval Surface Warfare Center Port Hueneme. Epirus says the system is designed to offer a reliable, scalable and reusable defence capability in complex maritime operations.
Epirus CEO Andy Lowery stressed the importance of filling a long-standing capability gap with a ready-to-deploy solution. “The Department of Defense has spent years of research and development and poured tens-of-millions of dollars into developing a non-kinetic vessel stop solution, with no operational system deployed to date,” Lowery said. “With Leonidas H2O, we are bringing forth a proven technology with demonstrated effectiveness to fill this capability gap, today.”
Brendan Applegate, Principal Investigator for the ANTX-Coastal Trident programme, highlighted the value of private-sector innovation. “Epirus’ participation in these experiments helps to facilitate early eyes on leading edge technologies that are key to enabling the Navy’s mission and helps provide valuable resources to the project team in support of their own technical development and assessment,” he commented.
In addition to its maritime application, Leonidas H2O builds on the company’s wider Leonidas product line, known for counter-swarm capabilities and open-architecture design. All variants feature an unlimited magazine, allowing for repeated use without the need for reloads—an advantage over conventional kinetic systems.
