Military Capabilities

Australia participates in inaugural trilateral submarine exercise with US, Japan

26 September 2017

Key Points

  • An Australian submarine has taken part in an exercise with US and Japanese boats for the first time
  • Participation improves the three naval services’ submarine interoperability

The Royal Australian Navy (RAN) has for the first time taken part in a trilateral submarine exercise with the US Navy (USN), and the Japan Maritime Self Defense Force (JMSDF).

Known as ‘Submarine Competition’ or ‘SUBCOMP’, the exercise tested each participating submarine’s crew’s ability to conduct “various aspects” of anti-submarine warfare (ASW), according to a statement from the USN’s Submarine Group 7 released on 26 September.

The exercise this year was conducted between 12–19 September in waters south of Japan and involved four unnamed submarines from the JMSDF.

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