Bath Iron Works builds some really high-tech tubs. The company, which became a subsidiary of General Dynamics in 1995, constructs surface ships for the US Navy. BIW is the lead designer and builder for the Arleigh Burke class AEGIS guided-missile destroyer, is building the next-generation Zumwalt class DDG-1000 land attack destroyer, and is part of the team developing the LPD-17 amphibious assault ship. BIW's Surface Ship Support Center offers design and engineering, upgrade, logistics, manpower management, fleet services, and other support services. Among the largest private-sector employers in the state of Maine, BIW built its first ship for the US Navy, the gunboat "USS Machias," in the 1890s.