During the Falklands War the Argentinian Type 209/1200 submarine "San Luis" performed a war patrol. While on their way to the area assigned the fire control computer went out of order. The vessel continued on to the combat area, and managed to fire at least 3 wire guided SST-4 mod0 torpedoes at the British fleet. The torpedoes suffered from various issues, with the guide wire cut a minute after launch and the torpedoes going off the assigned course. After the war testing revealed that the torpedoes' electric gyroscopes had reversed polarity, which resulted in a complete refit of the entire Argentinean torpedo stock, and a conversion of a portion of this stock from Mod0 to Mod1, performed by the firm which produced these weapons (AEG). Beside the torpedo issue, "San Luis" patrolled mostly undetected.