It has been mentioned that the Argentine sub captain reported that they had taken 2 tons of seawater down the snorkel (maybe due to severe weather) which had caused short circuits in the battery, though the captain said that these had been routine and managed. She then submerged on passage, again perhaps due to the bad surface weather, as this type of sub is noted for being particularly uncomfortable in bad weather on the surface. After this, nothing has been heard. Would leave the suspicion that the batteries later malfunctioned due to the seawater ingress, either releasing chlorine gas, or catching fire or even exploding. Any of these occurring underwater would be disastrous. The above 'hydro-acoustic anomaly' would be constant with this.