Several core components on naval vessels must be produced from metal with a high degree of accuracy. Machinist apprentices learn to operate all major types of manual and Computer Numerically Controlled (CNC) machine tools in the shipyard’s machine shops. Some of the equipment includes: boring mills, lathes and milling machines of all sizes. After apprentices display competency in manual machine tools, they progress to CNC equipment to learn modern processes and programming with CAD/CAM software systems. They work a wide variety of metals to produce brackets, bolts, shafts, bushings, and other machined parts.