The Doomsday Ships: New U.S. Ballistic Missile Submarine Program

... 240 out of 700 respectively), as well as 70 percent of total warheads (1090 out of 1,550). SSBNs accounted for about 50 percent of total warheads (1,152 out of 2,152). Building a new-generation SSBN is a top priority for any scenario. Today, the U.S. Navy has 14 Ohio-class SSBNs. Of them, 18 were built in 1976-1997, but in the 2000s four were converted into guided-missile submarines to carry Tomahawk cruise missiles . Each submarine has 24 SLBM tubes, although by 2018 the number is to be reduced to 20 through the deactivation ...