The fifth anniversary of the sinking of South Korean corvette Cheonan is fast approaching. Over this period, the RoKN has bolstered its defense capabilities, including antisubmarine capabilities, with new equipment and changes in its operational strategies and tactics, and toughened personnel training.

By U.S. Navy photo by Lt. Jared Apollo Burgamy [Public domain], via Wikimedia Commons

Every warship from corvette upwards have been fitted with an torpedo acoustic countermeasure equipment.

A naval intelligence analysis system has been set up to provide a three-dimensional map of underwater terrains.

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