CLAVE 1 / 4The US Navy aims to deliver two Virginia-class nuclear attack submarines per year by 2031.
CLAVE 2 / 4A Columbia-class ballistic missile submarine will join the fleet annually under the new production plan.
CLAVE 3 / 4General Dynamics Electric Boat and Huntington Ingalls Industries are the primary shipyards for the submarine programme.
CLAVE 4 / 4A "pencils down" policy limits design changes to safety or operational requirements only.
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