Infomarine.net

For years cofferdams (called mobdocks in Hydrex terminology - short for 'mobile mini dry docks') had to be large metallic structures that make a watertight fit to the hull of a vessel in order to seal out water from the area that is being repaired. Hydrex has pioneered many different uses of mobdocks including sealing off thruster tunnels at both ends before removing the water and creating a dry space within.

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