This is why ship chains are unique. You won't believe why the chain is more important than the anchor in a ship. An aircraft carrier's anchor can weigh more than 30,000 pounds, though chains are super strong alloys that can weigh up to 150,000 pounds. They have their own color code to protect the crew working around them, and always make sure that enough chain has been deployed after the anchor, minimizing tension, and thus the risk of the chain snapping in half. It is usually released with a 7-to-1 ratio, so for every one feet of depth, 7 feet of chain are released. Did you know about this?