As part of a major naval modernization effort, Taiwan plans to produce over 1,200 Hai Chien II, or Sea Sword II, air defence missiles to enhance fleet protection and establish a common medium-range air defence capability across its surface combatants. The move follows a successful live-fire trial conducted off the island’s southern coast, where the missile accurately engaged a representative unmanned aerial target.
The Sea Sword II is expected to become the backbone of the Republic of China Navy’s shipborne air defence network, replacing legacy missile systems that offer more limited range and performance. The programme reflects Taiwan’s growing focus on strengthening naval survivability in an increasingly contested regional security environment.
Military assessments indicate that approximately 688 missiles will be needed to equip current and future platforms, including modernized Kang Ding-class frigates, upcoming light frigates, Tuo Chiang-class stealth corvettes, and the Yushan-class amphibious assault support vessel. Factoring in reserve inventories and wartime requirements, total procurement could ultimately reach between 1,200 and 1,376 missiles.
Designed for integration with Taiwan’s domestically developed vertical launch system, the Sea Sword II provides all-direction engagement capability against aerial threats. The missile weighs around 183 kilograms, has a maximum range of roughly 50 kilometres, and travels at speeds approaching Mach 4.
The upgraded Kang Ding-class fleet is expected to field 32 missiles per ship, replacing obsolete M48 Chaparral launchers. Similarly, Taiwan’s new-generation frigates will incorporate Sea Sword II variants configured for either fleet air defence or anti-submarine warfare roles.
Tuo Chiang-class corvettes, excluding the lead prototype vessel, will carry 16 missiles each to support highly mobile distributed operations and coordinated “wolf pack” tactics. The larger Yushan-class amphibious transport dock will also be equipped with 32 Sea Sword II missiles launched from four launcher units, providing a substantial boost to its self-defence and escort capabilities.
