A ship and associated methods of formation and operation. In an example embodiment, a ship comprises a vessel for attachment to a second vessel. The vessel may comprise a catamaran hull including first and second parallel sides extending from a fore portion of the vessel to an aft portion of the vessel and defining a cavity when the vessel is afloat and a deck may be formed above the hull. A first connection component may be positioned along the fore portion and a second connection component may be positioned along the aft portion, the second component being of a connectable design, such that when a like second component is formed on another vessel, the like second component can be joined with the first component to effect a connection between the two vessels. A seal may be provided along the first component, positioned to sustain air pressure within the cavity when the like second component formed on the other vessel is joined to the first component.