A team of maritime engineers battle to move and sink a huge US Navy ship in the Cayman Islands to create an artificial dive reef. The team must battle winter storms and huge swells to tow the USS Kittiwake 1,600 miles from Virginia to the Caribbean. They must strip out all hazardous material from the old vessel, power clean her in a dry dock and cut holes in her hull to enable her to sink in a controlled flooding. Sink Master John MacKenzie must devise a foolproof way to ensure that the Kittiwake remains perfectly level and upright as he attempts to sink her onto a tiny site on the ocean floor surrounded by fragile coral on one side and a 1,000ft abyss on the other.