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The F-CK-1's GD-53 Golden Dragon X-band pulse-Doppler radar is derived from the F-20's AN/APG-67, which itself is a descendant of the AN/APG-66 of the F-16. This radar provides the F-CK-1 with look-down/shoot-down capability, and enables ten targets to be tracked and two to be engaged simultaneously using Sky Sword II active radar-seeking AAMs. The GD-53 has a maximum effective scanning range of 57 km (35 mi).
The F-CK-1 can carry two AAMs - either TC-1 Sky Sword Is or TC-2 Sky Sword IIs. The Sky Sword I is the ROC's first indigenous-developed missile system, first deployed in 1993. It is a short-range infrared-guided AAM roughly comparable to the AIM-9 Sidewinder. The Sky Sword II, in comparison, was deployed in 1999 and is a radar-guided beyond-visual-range AAM. Its seeker head, based on a Motorola-Raytheon design, was originally intended for use on the AIM-120 AMRAAM, however the contract was lost to Hughes. The TC-2 provides the IDF aircraft with a maximum missile range of 60 km (37 mi). Both missiles remain the primary AAMs in service with the ROCAF.
In addition to the Sky Sword missile systems, the F-CK-1 is also equipped with a single M61A1 20 mm cannon, mounted on the port-wing strake corner. An air-to-ground weapon, the GPS-guided Wan Chien cluster bomb, is currently undergoing testing and evaluation with the ROCAF.