The term may also be used for casting a net. The net is cast (thrown) by hand so that it spreads out on the water and sinks. Fish are caught in the net and it is hauled back in. Net casting is often used to catch fish for bait. Modern cast nets have a radius of from 4 to 12 feet (1.2 to 3.6 metres). A larger net full of fish may take more than one person to pull it in. Cast nets also sometimes use a 'net thrower' device. This helps spin the net as its thrown, keeping it open. Cast nets work best in shallow water.