Taiwan's first domestically built submarine, Hai Kun (711), carried out its sixth sea trial in Kaohsiung on January 26, 2026, testing sonar functions, the propulsion system, and the underwater log/speed-measurement instrument, according to an X post by @TaiwanMonitor shared during the reporting window from 1:16 p.m. to 2:48 p.m. UTC. The sea trial occurred today in Kaohsiung, as reported by @TaiwanMonitor, with a photo credited to Lin Ting-hui of the Military News Agency (軍聞社). This development marks continued progress in Taiwan's indigenous submarine program, with the trial focusing on key operational systems over the past 90 minutes of monitored activity.
