The Helgoland underwater laboratory is an underwater habitat. It was built by Dräger in Lübeck, Germany in 1968 for the Biological Institute Helgoland, and was the first of its kind in the world built for use in colder waters. It is named after the island Helgoland.
The habitat allowed divers to spend several weeks under water using saturation diving techniques. The scientists and technicians would live and work in the laboratory, returning to it after every diving session. Only once they had reached the end of their stay did they decompress in the UWL itself, being able to then resurface without coming to any harm. After experience gained in the first deployment, a wet section was added.
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