GROTON, Conn. – The Navy’s newest attack submarine, the New Hampshire, was christened Saturday, delivered eight months ahead of schedule and $54 million under budget.
She’ll join the fleet this fall. She’s the fifth Virginia-class boat and the first Block II.
I believe that the biggest difference between Block I and Block II boats are the construction methods. I can’t seem to find much information about other improvements. The Block III (starting with SSN 784) will have an improved bow section with two “six-shooter” launch tubes rather than the current 12 tubes.