During the sinking exercise (SINKEX) on July 12 as part of the sea phase of RIMPAC 2018, live fires from an aircraft, a submarine, and land assets sank the decommissioned ex-USS Racine (LST 1191) in waters 15,000 feet deep 55 nautical miles north of Kauai, Hawaii.
The sinking exercise (SINKEX) featured live firing of surface-to-ship missiles by the Japan Ground Self-Defense Force and a Naval Strike Missile (NSM) from a launcher on the back of a Palletized Load System (PLS) by the US Army.
A Royal Australian Air Force P-8A Poseidon aircraft also participated in the SINKEX.
“Today, we demonstrated the lethality and adaptability of our joint forces in the maritime environment,” said Admiral Phil Davidson, commander of United States Indo-Pacific Command. “As naval forces drive our enemies into the littorals, army forces can strike them. Conversely, when the army drives our enemies out to sea naval firepower can do the same.”



Twenty-five nations, 45 ships, five submarines, about 200 aircraft and 25,000 personnel are currently participating in RIMPAC that will end on August 2.
Source: https://www.dvidshub.net/video/613584/air-land-sea-strikes-sink-decommissioned-ex-uss-racine-during-rimpac