“The Navy is still ‘several years away’ from being able to print spare parts for ships and airplanes, but ‘that day will surely come,’ he said.
DOD is using these 3D printing machines across the military services. An item can be printed from an electronic blueprint or scanning an existing part. The U.S. Navy has about 70 3D printing, or additive manufacturing, projects at dozens of sites, Winnefeld said.”
Source: The Defense Industry Is Expanding the Use of 3D Printing – Defense One