Indigenous submarine begins sixth sea trialStaff writer, with CNATaiwan's first indigenous submarine, the Hai Kun (海鯤), or Narwhal, began its sixth sea trial today, drawing many military enthusiasts to Kaohsiung Harbor. Fans were spotted waving the Republic of China flag and holding banners to show support for the submarine project. Taiwan's first indigenous submarine, the Hai Kun undergoes a sea acceptance trial this morning at Kaohsiung Harbor. Photo: Lee Huei-chou, Taipei TimesThe submarine sailed out to sea from CSBC Corp, Taiwan's shipyard, for its sixth sea trial, or sea acceptance test (SAT). CSBC, the main contractor for the prototype of the Hai Kun, completed the fifth SAT for the submarine on Nov. 28 last year.