From what I've seen, most back sheaths or baldrics only cover the tip and the bottom foot or so of the blade. Above that, the blade is exposed and lays against a back piece that runs to the shoulder. At the top of the sheath is a pair of hooks that holds the hilt. To draw you pull the sword off the hooks, raise it about 12 inches or so until the tip is out of the sheath part at the bottom and than just swing the blade over your shoulder with a twist to be sure it does not catch on the hilt hooks.