Silt & foreign object removal underwater

Summary

The Challenge Owner undertakes maintenance of sea-going vessels in docking bays that are approximately 40 years old. Silt has accumulated to an estimated depth of 2m at the base of the 20m deep bays and must now be removed, along with sundry other items of debris which have fallen in. Space and headroom constraints mean that traditional dredging methods are not applicable. The challenge is to remove the (contaminated) silt and manage its disposal, using equipment that can access the dock below water from the dock entrance or else has very low height or can operate remotely.

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