What is a hand cranked derrick crane?

A hand-cranked derrick crane is a type of lifting device that utilizes a vertical mast and a horizontal boom to raise and lower loads. It is operated manually using a hand crank, which controls the movement of the boom and the load. These cranes are typically used in construction, rigging, and other applications where portability and simplicity are important. Their design allows for efficient lifting in areas where powered cranes may not be feasible.