EntityQ406995· pop 6U57Sign in to saveU57 or U-57 may refer to:ArticleU57 or U-57 may refer to: , various vessels Great snub icosidodecahedron , a sloop of the Royal Navy Small nucleolar RNA SNORD57Connectionsgreat snub icosidodecahedronEntityGerman submarine U-57EntityHMS Black SwanEntityCategoriesLetter–number combination disambiguation pages