Rocna Original AnchorRocna Original Anchor The Rocna is a true multi purpose anchor that sets and holds in most seabeds, from soft mud to hard sand, clay, grass, and kelp. A Rocna remains stable and buried, and does not roll out on reversal or veering of load, or if dragged beyond yield, providing enhanced security. Rocna anchors are designed and built for strength and durability. The Rocna shank is designed so the anchor self launches and self stows on the majority of