Navy Delivered 3D-Printed Parts in Under 24 Hours at RIMPAC 2026

A Navy Supply Ship in 24 Hours

The U.S. Navy ran its most ambitious test of 3D printing at sea during RIMPAC 2026, the world's largest maritime exercise. Military personnel manufactured replacement parts, loaded them onto a digitally crewed surface vessel, and delivered them to joint forces in less than 24 hours. The vessel then carried drone components to the Army's 25th Infantry Division, where Marines and soldiers assembled and tested the aircraft.

How It Worked

The Naval Postgraduate School's Consortium for Advanced Manufacturing Research and Education, known as CAMRE, combined distributed manufacturing, artificial intelligence, and autonomous transportation into one logistics system. The Joint Advanced Manufacturing System tracked requests, assigned work among production nodes, and monitored the logistics process from design to delivery.

Morgan Bower, director of the FLEETWERX Innovation Hub, described the exercise as a test of whether commanders can manufacture certain parts aboard ship. That capability would let the military reserve scarce transportation capacity for munitions and complex components that cannot be produced locally.

The Harder Problem

RIMPAC also exposed why a working printer is not enough. A hybrid manufacturing system aboard the aircraft carrier USS Theodore Roosevelt repeatedly developed slight laser misalignments traced to vibrations from aircraft landing on the flight deck. The movement was tiny, but precision manufacturing leaves little room for error.

Consumables create another headache. Metal printing requires inert gas to prevent oxygen from weakening a part during production. Gas cylinders consume valuable space aboard ships and eventually run out. One printer used during the exercise included a nitrogen generator, allowing it to produce shielding gas aboard the ship.

People Matter More Than Printers

The most important lesson did not concern a printer or algorithm. It concerned the people expected to operate them. Experienced operators transfer, receive promotions, and rotate between sea and shore assignments. Unless the Navy institutionalizes their knowledge, a ship may possess advanced machinery without anyone capable of using it when equipment fails.

RIMPAC demonstrated that distributed manufacturing can compress parts production and delivery into hours under the right conditions. Its deeper lesson was less futuristic: readiness still depends on trained people, disciplined testing, and logistics systems designed around operational reality.