Here's a modern commercial fishing net: [1] The net itself isn't that heavy per unit area; it's just big. The top support line of the net is a string of floats,

Here's a modern commercial fishing net: [1] The net itself isn't that heavy per unit area; it's just big. The top support line of the net is a string of floats, like pool lane markers, but larger. They're fishing for herring, not the Great White Whale. Anti-submarine nets are far, far heavier.[2] MESH ROPES: - flexible steel galvanized wire rope This is a single strand, flexible steel galvanized wire rope consisting of 70 wires and 21 hemp yarns. It is one-inch in diameter, has a breaking strength of 98,280 pounds and is internally lubricated and protected against the action of salt water by saturating the fiber cores with a preservative composition. It weighs 1.8 pounds per running foot and is supplied on reels carrying 3,000 feet of wire and weighing 5,000 pounds packed for shipment. The top support line of a submarine net looks like a bridge cable. The floats are the size of cars or larger. [1] https://www.youtube.com/watch?v=k_CP6VtgDVc https://www.youtube.com/watch?v=k_CP6VtgDVc [2] https://maritime.org/doc/netsandbooms/index.php https://maritime.org/doc/netsandbooms/index.php