Seaspan Corporation is an independent charter owner and manager of containerships. It charters pursuant to long-term, fixed-rate time charters with various container liner companies. It operates a fleet of approximately 90 containerships. Its operating vessels include YM Wish, YM Wellhead, YM Witness, CSCL Manzanillo and Guayaquil Bridge. Its over four 4,800 20-foot equivalent unit (TEU) vessels are chartered by Mediterranean Shipping Company S.A. under bareboat charters, which are contracts for the use of a vessel for a fixed period of time. It is responsible for the operation and management of vessel, including maintaining the vessel, periodic dry-docking, cleaning and painting and performing work required by regulations under each of the time charters. It also provides limited ship management services to Dennis R. Washington's personal vessel owning companies, and ship management and construction supervision services to Greater China Intermodal Investments LLC (GCI).