“With our Aqualungs we were now able to descend to 200 or 300 feet . . . to go further exposes a diver, not merely to increased pressure, but to a phenomenon known as ‘the rapture of the depths.’ The chief symptom of this phenomenon is, to put it bluntly, the sensation of becoming as drunk as a hoot owl.” – Jacques -Yves Cousteau, National Geographic, 1952. Maiden voyage of the Calypso.