The Korean Central News Agency announced on Thursday, 16 October 2026, that a North Korean submarine had test-fired two types of strategic cruise missiles in the waters off the country’s eastern coast. Senior naval officers were present, and the agency stressed that the exercise was part of a routine mobilisation-readiness inspection that posed no threat to neighbouring states. While the state media provided only sparse technical details, satellite-based monitoring by South Korea’s Joint Chiefs of Staff (JCS) confirmed that the launches were tracked from pre-launch through the cruise and terminal phases.
The JCS briefing revealed that the two missiles were launched by different mechanisms. One missile left the hull through a vertical launch system (VLS) a method that allows a submarine to eject a weapon vertically from a sealed cell, while the second was expelled from a traditional torpedo tube. Analysts note that the VLS approach can deliver a salvo more quickly and with a lower acoustic signature, thereby shrinking the reaction window for adversary defence networks. Photographic evidence released by KCNA showed a diesel-powered vessel identified as the “Kim Kun Ok Hero,” a platform that was first unveiled in September after extensive modification.
Launch methods and technical observations
The dual-method test underscores a strategic shift toward versatility in North Korea’s under-sea arsenal. By demonstrating both vertical launch and torpedo-tube deployment the navy showcases flexibility that could complicate detection and interception efforts. Vertical launches, in particular, are capable of propelling missiles at higher initial velocities, enabling larger salvos and potentially overwhelming coastal defence radars that are calibrated for slower, tube-based ejections. The use of a torpedo tube, meanwhile, hints at continued reliance on legacy systems that remain compatible with older hull designs.
Experts from the Korea Defense and Security Forum emphasised that these drills represent a step toward operational deployment of the combat system, not merely a static test. The presence of senior officers suggests that the navy is evaluating crew proficiency, launch sequencing, and system reliability under realistic conditions. However, the test did not include a submerged launch, a long-duration patrol, or a launch of a submarine-launched ballistic missile (SLBM) capabilities that remain unproven.
Strategic implications for regional defence
From a security perspective, the emergence of a mixed-launch capability adds a new variable to the already complex missile landscape of Northeast Asia. The ability to fire cruise missiles from a VLS shortens the warning time for coastal radar systems, potentially forcing neighbouring navies to rethink detection protocols and engagement timelines. In addition, the demonstration of reliability and “high dependability,” as quoted by KCNA, signals that Pyongyang views these weapons as integral to its broader strategic deterrent posture.
South Korean and Japanese defence planners have already warned that any increase in sea-based launch options could erode the effectiveness of existing layered defence architectures, which rely heavily on early-warning radar and interceptor missiles. The dual-launch test therefore raises the prospect of a more unpredictable threat envelope, compelling regional forces to allocate additional assets to maritime surveillance and to consider counter-VLS technologies.
Analyst assessment of operational readiness
While the drills mark a visible advance, most analysts agree that North Korea’s under-sea strike capability remains in a formative stage. Hong Min of the Korea Institute for National Unification described the event as a “limited operational capability” because it omitted key elements such as submerged firing, extended patrol endurance, and confirmed SLBM performance. Nevertheless, Shin Jong-woo, secretary-general of the Korea Defense and Security Forum, warned that an SLBM launch could follow shortly, indicating a trajectory toward a fully fledged sea-based nuclear deterrent.
The coexistence of VLS and torpedo-tube launches demonstrates technical adaptability, yet the lack of full-scale operational proof points to a capability that is still being refined. Regional militaries will need to monitor subsequent drills closely, as any shift toward regular submerged or ballistic launches would markedly elevate the strategic calculus in the East Asian security environment.
