A first attempt to attack the British fleet was made on 2 May 1982, but this was abandoned due to in-flight-refuelling problems. On 4 May, two Super Étendards, guided by a Lockheed P-2H Neptune, each launched one Exocet at the British destroyer , with one missile crippling "Sheffield". On 25 May, another attack by two Super Étendards resulted in two missiles hitting the merchant ship , which was carrying several helicopters and other supplies to the front line. The Exocets that struck "Atlantic Conveyor" had been inadvertently redirected by decoy chaff deployed as a defensive measure by other ships; Both "Sheffield" and "Atlantic Conveyor" sank whilst under tow some days later following these Exocet strikes.