Marine transportation and construction: Stern (rear) view of USS Gem State, a US Navy Keystone State Class Crane Ship, carrying 6 - 30 ton capacity cranes. Built in 1965 as the breakbulk ship, President Monroe, it was converted to a crane ship in Bay City, Michigan in 1984. 669 ft long, 76 ft beam (width), 33 ft draft, 17 nautical mi speed, it has cargo capacity of 300+ standard containers. It has 2 boilers, 2 geared steam turbines, 10,747 shp, one propeller. Port of Portland, Oregon, 2005.