 After the covers were lifted off and placed aside using the hatch crane, the cargo could be dumped into the three holds, which would normally take 3–4 hours to complete.They were unloading used Hulett cranes, which reached into the bottom of the holds and grab 10-15 tons per bite, much like a large playground crane.After all the cargo was either in or out of the holds, the hatch covers would be replaced and clamped down using the dog-ear or butterfly clamps.