A manual trolley is a device used for moving heavy loads horizontally along a beam or track. It typically consists of a frame with wheels or rollers that run along the beam, allowing for smooth and controlled movement of the load. Manual trolleys are operated by hand, either by pushing or pulling them along the beam. They are commonly used in industrial settings. In maritime applications, manual trolleys can be used in shipyards, docks, and onboard vessels for moving cargo, machinery, and other heavy items. They provide a flexible and efficient solution for horizontal transportation of loads in diverse environments.