
North Korea’s Nuclear Submarine Program Could Seriously Complicate a Future US War Effort
The DiplomatOn October 8 South Korean media outlets cited sources in the country’s armed forces and National Assembly to report that North Korea was believed to have begun construction of its first nuclear-powered submarine. One of the most significant uncertainties surrounding the North Korean nuclear-powered submarine program remains whether its ships will be strategic ballistic missile submarines designed to deliver multiple megatons of nuclear force against enemy cities, or whether they will be attack submarines able to function in a much wider range of conventional and nuclear roles. The former submarine type would revolutionize the second arm of North Korea’s nuclear dyad, which may soon become a triad should an air launched variant of existing nuclear-tipped cruise missiles be developed. In contrast to a ballistic missile submarine, an attack submarine would provide a fundamentally new capability to North Korea’s armed forces – namely the ability to project naval power across oceans. Recent advances in thermonuclear warhead miniaturization, long-range cruise missile engines, solid fuel ballistic missile engines, and hypersonic glide vehicles are among the notable areas that could serve to make North Korea’s future nuclear submarines highly potent.
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