While the 35 mm radar-guided and 20 mm antiaircraft guns in Port Stanley and Goose Green forced Sea Harrier and Harrier GR.3 to carry out air strikes from high altitude, the Argentine garrisons at West Falkland relied only on 12.7 mm machine guns for their own protection, which left them exposed to strafing and low-level bombing. Some days later, with the British landing at San Carlos bay still ongoing, the Argentine troops found their mark when they shot down a GR3 Harrier on a recce mission. The pilot, Flt. Lt. Jeffrey Glover, bailed out safely and was taken prisoner.