“Since 2006, CBO has performed an analysis of the Navy’s annual report on its plans for building new ships over the next 30 years. This CBO report summarizes the ship inventory goals and purchases described in the Navy’s 2013 plan and assesses their implications for the Navy’s funding needs and ship inventories through 2042.
The 2013 plan contains some significant changes in the Navy’s goals for shipbuilding during the next 30 years. Compared to the 2012 plan, the 2013 plan:

• Reduces the goal for the inventory of ships from 328 to a range of 310 to 316,
• Reduces the number of ships to be purchased from 275 to 268, and
• Buys 17 more high-end combat ships and 24 fewer less-expensive support ships.