Before revision: Grounded freighter after Hurricane Katrina, being salvaged using pneumatic bladders to raise and roll it back into the water Reef ball being deployed The The Reef Ball Foundation uses a pneumatic bladder technology to float an artificial coral reef ("reef ball") into location, then deflate the bladder to sink the reef to the bottom.
After revision: Grounded freighter after Hurricane Katrina, being salvaged using pneumatic bladders to raise and roll it back into the water Reef ball being deployed The Reef Ball Foundation uses a pneumatic bladder technology to float an artificial coral reef ("reef ball") into location, then deflate the bladder to sink the reef to the bottom.