A new class of warships that President Trump says will anchor a “golden fleet” for the Navy is expected to cost at least 50 percent more than estimated earlier, according to a government report released on Wednesday.
The first planned Trump-class battleship, the U.S.S. Defiant, is likely to cost $23.4 billion, $8 billion more than the Navy initially indicated.
The cost of each of the 14 additional vessels is expected to jump to slightly more than $18 billion from $10.2 billion, for a total cost of $275 billion for 15 ships.
The estimates were calculated by the nonpartisan Congressional Budget Office, which said that the first of the battleships might take eight years or longer to build.
Months after the announcement, Mr. Trump decided that the ships would be powered by nuclear reactors instead of the gas turbine engines used in destroyers and cruisers, a move that adds significantly to the costs.
Mr. Trump has said he may want to build as many as 25 nuclear-powered battleships, which he called the “golden fleet.”
Building 25 of the larger warships would cost roughly $455 billion, according to the figures provided by the report.
Whether any of the ships will ever actually be built is not certain, as the Navy in recent years has tried and failed to build new types of warships on time and on budget. One such program, the Constellation-class frigate, was canceled just a month before Mr. Trump announced his namesake vessel. Another, called the littoral combat ship, has been plagued by problems and the Navy has already begun decommissioning some of them.
The Ford-class aircraft carriers have been bedeviled by mechanical and electrical problems since the lead ship of the class was commissioned. Only one is currently in service, and the delivery of the next two has been delayed by years.