Why did Australia choose Virginia-class submarines rather than buying more Astute-class boats?
Short answerVirginia remains in active production, while Britain is winding down Astute construction and focusing its submarine yards on Dreadnought.
NotesAustralia's interim Virginia-class choice is explained through production timing rather than a simple ranking of submarine designs. The United States still has an active Virginia construction line. Britain, by contrast, is ending Astute production while concentrating on Dreadnought ballistic-missile submarines. An available industrial line can determine alliance procurement even when multiple designs are capable.