ThayerMahan, a provider of unmanned maritime security solutions based in Groton, Connecticut, announced the launch of SeaGuard on March 19, 2026. This operationally validated, non-kinetic system targets uncrewed underwater vehicle (UUV) threats to protect ports, naval bases, and critical infrastructure.
SeaGuard disrupts and defeats UUVs, deters diver and swimmer intrusions, and safeguards assets from tampering or sabotage. Its performance has been demonstrated in multiple exercises, confirming endurance, maintainability, and a mission-ready architecture at Technology Readiness Level 8+.
“SeaGuard is the culmination of the ThayerMahan team’s incredible effort and ingenuity,” said Andy Meecham, Chief Technology Officer. “In trials, SeaGuard consistently produced repeatable, measurable defeat effects across a wide range of conditions, validated through multi-environment testing, independent technical assessment, and sustained endurance runs.”
The modular, scalable design supports expeditionary or permanent installations and integrates with ThayerMahan’s acoustic intelligence systems, including TransparenSea, SeaPicket, and Outpost, to form a detect-to-defeat chain. It employs a non-kinetic approach safe for marine life and the environment.
“This isn’t just a solution for naval bases – it’s a mission-ready system for commercial ports and strategic assets worldwide,” stated a ThayerMahan representative. SeaGuard addresses rising underwater threats with rapid deployment and easy sustainment for navies, port authorities, and operators.