The immense darkness and no natural light, and the weight of that crushing weight, so you are operating in pitch darkness at a depth that many things will feel. >> his book "the dive" is about the deepest ocean rescue to date. in the early 1970s the "pisces 3" sunk beneath the ocean surface while looking for a phone cable, and for three days they struggled to get the lines attach and haul up the submersible with two experienced submersibles. >> was there a stage when you thought that you would get up? >> no, not at all, because we knew that we would get up, and we could talk to the surface, an...