Taiwan's first indigenously constructed submarine, Hai Kun (711), successfully completed its maiden dive test in Kaohsiung earlier today, according to Taiwan Monitor on X. This marked the seventh in a series of sea trials that began in June 2025, with footage showing the vessel leaving Kaohsiung Harbor captured by SET News. The sea trials for Hai Kun, reported via a post from @TaiwanMonitor on X between 2:15:58 PM and 4:46:19 PM UTC on January 29, 2026, demonstrate progress in Taiwan's domestic submarine program. No official statements from Taiwan's Ministry of National Defense appeared in the reporting window confirming additional details on the dive test duration or depth achieved. Taiwan Monitor shared the SET News footage highlighting Hai Kun departing the harbor, underscoring the milestone as the first locally built submarine to reach this stage in sea trials.
