For the demo, Boelsems had scale models of actual anchors---CQR, Danforth, Manson, and Rocna---fabricated. His specs called for the anchors to accommodate a fairly heavy boat of 40,000 pounds displacement and 45 feet in length. Dragging each of the models through a rectangular basin filled with sand and water shows how each lands, sets, and digs in. Boelsems says the key to his product's performance is the location of its center of gravity. Very interesting!