Mystery Sheen, South Marsh Island Block 112, Offshore LA

On 23MAY2012, USCG MSU Morgan City contacted the NOAA SSC about a mystery sheen discovered by BSEE during an unrelated flight. The sheen is approximately 65 miles offshore, due south of Marsh Island. There is no known source and product chemistry is unknown. Platforms in the area were contacted and none report any release. USCG is requesting a trajectory, fate of sheen and hindcast.