ARA San Juan

An Argentine Navy TR-1700-class diesel-electric submarine. The ARA San Juan went missing on November 15, 2017 during routine patrol in the Atlantic Ocean, 240 nautical miles (432 km) offshore in the Golfo San Jorge, which is around 920 miles (1,500 km) south of Buenos Aires.

On November 23, the Argentine Navy said an event “consistant with an explosion” was detected coming from the ship. The search for the ship and 44 crew members was abandoned on November 30, 2017.