History of the anchor the early 2000s took elements of the Spade and other types, and developed unique solutions of his own, in order to design the "Rocna" anchor, a general purpose type which uses a concave fluke, a self-righting roll-bar, and setting skids. History of the anchor The History of the anchor dates back millennia. The most ancient anchors were probably rocks and many rock anchors have been found dating from at least the Bronze Age. Many modern moorings still rely on a large rock as the primary element of their design. However, using pure mass to resist the forces of a storm
Spade money Spade money Spade money was an early form of coin used during the Zhou dynasty of China (1045 to 256 BC). Spade money was shaped like a spade or weeding tool. Under the Xin dynasty created by Wang Mang spade money was reintroduced, there were 12 different types of spade money in the Xin dynasty ranging in values from 100 to 1000 "qián". Hollow-handled spades () are a link between weeding tools used for barter and stylised objects used as money. Although flimsy, it retains the hollow socket by which a genuine tool could be attached to its handle. This