NOAAS McArthur (S 330), was an American survey ship in commission in the National Oceanic and Atmospheric Administration (NOAA) from 1970 to 2003. Prior to her NOAA career she was in commission in the United States Coast and Geodetic Survey from 1966 to 1970 as USC&GS McArthur (CSS-30). In 2007, the ship went into private service with Blackwater Worldwide (later known as Blackwater USA, Xe Services LLC, and Academi) as the maritime security and training ship M/V McArthur