Industrial divers don't have much time to marvel at the wonders of the deep seas. They tend to work mainly in flooded building pits and the brackish waters of ports, where they can barely see their hands in front of them. At Museum Island in Berlin, a diving company is hard at work helping construct a new reception hall. They're installing 1200 pilings - not a job for the fainthearted. Report by Sonja Schock.