Over the next 30 years, the Navy’s 2017 shipbuilding plan would cost 30 percent more than the service has received historically, CBO estimates. If future Navy shipbuilding budgets are in line with those over the past 30 years, the Navy’s fleet will be about 20 percent smaller in 2046 than under the Navy’s plan. A larger fleet of around 350 ships could cost about 60 percent more per year than average historical shipbuilding budgets.
