2026UK Astute-class rotational deployments to Western Australia begin. DFARS rare earth restrictions phase in.
2027First Ohio-class SSBN retires. Columbia statutory delivery date missed. Potential deterrence gap opens.
2029Columbia lead boat (USS District of Columbia) expected delivery (revised). US/UK sub rotations at HMAS Stirling.
2032-35PLAN targets 435 ships, 9 CSGs. SSN-AUKUS construction begins. PLAN submarine force growing to 80.
2040Last Ohio-class retires. All 12 Columbia boats must be delivered.