Dee ihe na-aga n'ihu maka paragraf a - NASSCO malitere iwu ụgbọ mmiri na-ebu ahịa na 1959, n'ikpeazụ gụnyere nnukwu ụgbọ mmiri na ụgbọ mmiri na-ebu mmanụ "Alaska". Ụgbọ mmiri azụmahịa ya a kacha mara amara bụ "Exxon Valdez" nke na-ebu mmanụ, nke rụchara ụlọ na NASSCO na 1986, na 1989 laghachiri NASSCO maka mmezi mgbe ihe mberede ya na mmanụ mmanụ
n'Alaska. Na December 2012 ụlọ ọrụ ahụ bịanyere aka na nkwekọrịta iji wuo ụgbọ mmiri abụọ na-arụ ọrụ site na gas gas (LNG). Mgbe e wuchara ha, ha ga-abụ ụgbọ mmiri LNG kachasị ukwuu n'ụwa.