"He"d never actually done any sub diving before," says Vescovo. "I told him: "Strange things happen down there." The visibility is terrible, it"s very confusing once you go down below 500m (640ft) or 1,000m (3,280ft), let alone 6,000m (19,685ft). And everything is harder. He was like, "No, no, no I"m 99% convinced we are going to find it, it"s here." Sure enough, on our first dive we"re down there for four hours and we find nothing."