On April 25, 2025, Kim Jong Un launched a new 5,000-ton Choe Hyon-class destroyer, purportedly to expand North Korea’s “operational range and preemptive strike capabilities.” The multipurpose destroyer is equipped with anti-air and anti-ship missiles, and can bearmed with tactical nuclear-capable ballistic and cruise missiles. The Supreme Leaderindicated that the new ship would patrol North Korea’s coastal waters, as well as “the waters of middle demarcation lines” with other nations. It is unclear what Kim meant by the new ambiguous term, but it could “represent a fresh challenge to the Northern Limit Line (NLL).” Until now, North Korea has lack sufficient naval power to challenge the NLL. However, the launching of the heavily armed destroyer adds a new capability that Kim can leverage to redraw the maritime boundary.
The NLL has served as the de facto maritime boundary separating North and South Korea since 1953, but the North does not recognize the legitimacy of the line. A renewed North Korean challenge to the boundary line will undoubtedly increase tensions between the two nations in these “historically contested waters,” raising the risk of conflict at sea. North Korea’s last challenge occurred in January 2024 when Kim called on the Supreme People’s Assembly to amend the North Korean constitution to define South Korea as its “No. 1 hostile country and unchanging principal enemy.