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The Naval Facilities Engineering and Expeditionary Warfare Center (NAVFAC EXWC) Ocean Technical Department (OTD) is the Department of Defense (DOD) provider for seafloor engineering, moorings, shore-based hyperbaric facilities, and underwater cable structures. 

The OTD also provides specialized engineering in pier and wharf condition assessment, marine and offshore structures, seafloor surveys, and ocean construction. The department maintains NAVFAC's ocean engineering subject matter experts in ashore hyperbaric and diving systems, specialized and fleet moorings, underwater construction, magnetic silencing facilities, underwater inspection, and underwater cable facilities. 

Moreover, the OTD supports the Fleet (Underwater Construction Teams), and sponsors within Naval Sea Systems Command, Naval Air Systems Command, and other U.S. Navy and DOD-supported commands. 

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