A fascinating pictorial document: On an old, cluttered work ship, a man is helped on with a bulky, old fashioned diving suit. It's a complicated process, many layers and sections are carefully applied. He goes over the side. Some men row out to what looks like a wrecked barge and set dynamite. Then the diver returns and now laughs and acknowledges the camera. The other men, now safely away, blow up the barge.