Parbuckling is an old trick for loading almost anything cylindrical up a ramp. Lines are fastened to a solid belay point, passed under the load and back. They are then hauled to roll the load, normally up a ramp, or even the side of a ship. It takes less effort than hoisting the load. Parbuckle salvage is just one application of the technique.

http://books.google.com/books?id=LUlLAAAAMAAJ&pg=RA1-PA34&lpg=RA1-PA34&dq=parbuckle+knights+modern+seamanship&source=bl&ots=-U8N9fT8Lh&sig=o0WOG9VhCvi6UwtF0r3TycC1brA&hl=en&sa=X&ei=Mr03UtXtGuTD4APNgYHIDw&ved=0CDcQ6AEwAg#v=onepage&q=parbuckle%20knights%20modern%20seamanship&f=false

http://www.merriam-webster.com/dictionary/parbuckle

Here is an interesting example in logging. http://lumberjocks.com/mart/blog/7919