Trilateral Naval Training between US, Japan and Australia near China.

According to information published by the U.S. Navy on March 17, 2022, the Arleigh Burke-class guided-missile destroyer USS Momsen (DDG 92) joined the Japan Maritime Self-Defense Force (JMSDF) and the Royal Australian Navy (RAN) in the South China Sea for multinational training which concluded March 15.
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Arleigh Burke-class guided-missile destroyer USS Momsen (DDG 92) joined the RAN Anzac-class frigate HMAS Arunta and the JMSDF Murasame-class destroyer JS Yuudachi (Picture source: US Navy)

The training was designed to address common maritime security priorities and concerns, enhance interoperability and communication, and develop mutually-beneficial relationships, as well as promote navigational freedom in support of a free and open Indo-Pacific.

The U.S., Japan, and Australia have a long-standing interest in promoting global security, stability, and economic prosperity through trade, investment, and connectivity. Trilateral training in the South China Sea with joint and partner nations develops and exercises tactical interoperability and promotes synchronization.

Participants included Momsen, JMSDF Murasame-class destroyer JS Yuudachi (DD 103), RAN Anzac-class frigate HMAS Arunta (FFH 151), and a U.S. Navy P-8 from Patrol Squadron (VP) 26.

USS Momsen (DDG-92) is an Arleigh Burke-class destroyer in service with the United States Navy. Momsen is the twenty-sixth destroyer of the Arleigh Burke-class to be built by Bath Iron Works.

HMAS Arunta (FFH 151) is an Anzac-class frigate of the Royal Australian Navy (RAN). The ship, named for the Arrernte people, was laid down in 1995 and commissioned in 1998. Since entering service, Arunta has performed a wide range of duties, including border protection patrols in northern Australian waters, and several deployments to the Persian Gulf.