Mystery Sheen, Timbalier Block 30, 5mi Offshore, LA

On 12MAR, USCG MSU Morgan City contacted NOAA SSC in regards to a report of a mystery sheen, 5mi by 100 yrd, with 50% cover of rainbow and silver sheen. The sheen was reported by a platform in Timbalier Block 30 after witnessing a vessel transit the area. The sheen appears to be traveling west. The product chemistry and quantity is not known. USCG is requesting a trajectory from NOAA.