Disappearance of ARA San Juan

On 15 November 2017, the Argentine submarine ARA San Juan disappeared in the South Atlantic off the coast of Argentina while on a training exercise. After a search lasting 15 days, the Argentine Navy downgraded the operation from a rescue mission to a search for the submarine's wreck, implying they had given up hope of finding survivors among its crew of 44. It was the worst submarine disaster since the accident on Chinese submarine 361 in 2003, and the second worst peacetime naval disaster in Argentina after the 1949 sinking of the minesweeper ARA Fournier.