Substructure Completes Hydrographic Clearance Survey at Naval Shipyard
In early 2011, Substructure completed a hydrographic clearance survey of the Portsmouth Naval Shipyard. This survey was to ensure that all of the materials for the cofferdam, which had been put in place during a dry-dock expansion, were removed at the end of the job. For this project, Substructure utilized its multi-beam sonar and its survey vessel Orion.
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