 Autonetics began such development even before the original Minuteman entered fleet service, and the Minuteman-II had a CEP of .Additionally, the computers were upgraded with more memory, allowing them to store information for eight targets, which the missile crews could select among almost instantly, greatly increasing their flexibility.From that point, Minuteman became the US's primary deterrent weapon, until its performance was matched by the Navy's Trident missile of the 1980s.