Argentine missing sub: "Explosion-like" noise analyzed in Vienna Argentina's navy confirmed Thursday that an unusual noise heard in the ocean near the last known position of a submarine appeared to be an explosion, dashing the last hopes of finding the vessel and its 44 crewmembers. In Vienna, Comprehensive Nuclear-Test-Ban Treaty Organization analyses the data to try and locate the missing sub based on the "explosion-like" signal they've detected. IMAGES AND SOUNDBITES