Taiwan Successfully Tests First Indigenous Submarine, Boosting Defense Capabilities

Taiwan has successfully completed its first-ever underwater sea trial for its indigenously developed submarine on Thursday. This marks a significant defense milestone aimed at bolstering deterrence against regional tensions and safeguarding crucial maritime routes.

In the face of heightened geopolitical challenges, Taiwan’s domestic submarine program supports its ambitious efforts to modernize its armed forces. The project draws from American and British technology and expertise, originally slated for eight submarines but with the first named Narwhal completing a shallow-water submerged navigation test off southern Taiwanese port Kaohsiung.

Taiwan’s CSBC Corp, the leading company involved, emphasized that submarines are critical strategic assets due to their deterrent power. Despite project delays and challenges stemming from international environments and pressure from Chinese authorities, the first submarine—estimated at $49.36 billion—is expected for delivery in 2024. Equipped with a combat system by Lockheed Martin Corp and US-made Mark 48 heavyweight torpedoes, this innovative vessel will be deployed.

Official sources indicate Taiwan aims to deploy at least two homegrown submarines by 2027, with future models incorporating missile systems. Given the volatile regional dynamics and ongoing territorial disputes with China, President Lai Ching-te announced in November 2025 that his administration would allocate an additional $40 billion towards defense spending.