Vatn Systems builds affordable autonomous underwater vehicles that operate in cooperative swarms for US military, allied nations, and commercial customers. The company develops the Skelmir S6 compact modular underwater effector and the Skelmir S12 platform, powered by its proprietary INStinct inertial navigation system for GPS-free operation. Founded in 2023 by Nelson Mills, Vatn Systems has raised $76.5 million in funding, including a $60 million Series A in 2025, and maintains production facilities in Rhode Island.