Ship-to-Shore Container Market Technological Outlook and Raw Material Trends, 2024-2030 Get more info: https://www.stellarmr.com/report/Ship-to-Shore-Container-Crane-Market/1196 Container cranes used on ships to shore (sts) are also known as container cranes, rail mounted quay cranes, or portainers. STS container cranes are gantry-style cranes that load and unload containers from ships to docks and vice versa. Spreaders (a device with a locking mechanism attached to the four corners of the containers) are used by these cranes to handle the containers.