Four The estimate can be $3.1 billion in fiscal 12 months 1998 dollars, which we utilized in our calculations. 5 A fiscal yr 1998 greenback estimate offered by new attack submarine program officials. Chapter 2 The Navy’s SSN-688 class submarines are designed to function for 30 years. However, till not too long ago, Navy submarine working and ssn24. me maintenance plans would have resulted within…