SeaRush is a rapidly built 3D – printed uncrewed surface vessel designed as a testbed for hybrid crewed – uncrewed naval operations and swarm – enabled maritime concepts.

The Netherlands needed just five months to turn an uncrewed surface vessel (USV) concept into a working prototype, now undergoing its first on – water tests as a 3D – printed platform.

Built using existing production chains, MARIN’s “SeaRush” pairs a 3D – printed hull with a Honda outboard engine, externally controlled through a system supplied by Italy – based UltraFlex.

The hull itself is produced in collaboration with local firm IMPACD Boats and reportedly took just one week to manufacture.

SeaRush reflects the Netherlands’ broader push toward a hybrid maritime force that blends crewed and uncrewed platforms, as the Royal Netherlands Navy calls for greater production of more affordable USVs.

MARIN plans to conduct more sea trials in June, aligning with Dutch Ministry of Defence’s efforts to accelerate experimentation, with SeaRush serving as a testbed for future concepts.

Simplifying Structure
Developed under the KNOWONE program, SeaRush is intended to streamline how uncrewed vessels can work alongside crewed platforms without increasing operator workload.

MARIN said future iterations could also integrate with aerial systems, including drones.

Beyond the vessel itself, the company is working on a software to enable a “maritime swarm” of USVs capable of teaming with manned naval assets.

It said multiple software concepts were already simulated across early USV prototypes, with EagleScience helping ensure the system matched the vessels’ hardware.

• NextGen Defense