The Wasser- und Schifffahrtsamt Duisburg-Rhein offers itself with the diving bell ship "Carl Straat" a special ship at least unique in Europe. Its crew can remove dangerous obstacles up to 10 m underwater, check weirs and locks, anchor buoys or conduct ground investigations. To this end, it uses a steel bell open downwards, from which the river water is blocked by overpressure.
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The Wasser- und Schifffahrtsamt Duisburg-Rhein offers itself with the diving bell ship "Carl Straat" a special ship at least unique in Europe. Its crew can remove dangerous obstacles up to 10 m underwater, check weirs and locks, anchor buoys or conduct ground investigations. To this end, it uses a steel bell open downwards, from which the river water is blocked by overpressure.