The TC-1 Sky Sword I (天劍一, Tien Chien I) is a short range infrared guided air-to-air missile developed by the Chungshan Institute of Science and Technology in Taiwan ROC, for the ROC Air Force. The missile was developed in the mid to late 1980s and is presently deployed on the ROCAF's F-CK IDF fighters. They are the major air-to-air missiles used by IDF along with the radar guided Sky Sword II (TC-2).