韓国と同型のインドネシアの209型潜水艦が消息を断つ

Indonesia has launched search efforts for a navy submarine which has gone missing with 53 people on board, officials say.

The submarine was conducting a drill in waters north of the island of Bali but failed to report back the results.

Indonesia's military chief said warships had been dispatched to find the KRI Nanggala-402 vessel.

Officials have called on Australia and Singapore to help in the search. The countries have not publicly commented.

The German-made submarine is thought to have disappeared in waters about 60 miles (96km) off the coast of Bali early on Wednesday morning.

https://www.bbc.com/news/world-asia-56829278

チャクラ級潜水艦
https://ja.wikipedia.org/wiki/%E3%83%81%E3%83%A3%E3%82%AF%E3%83%A9%E7%B4%9A%E6%BD%9C%E6%B0%B4%E8%89%A6