ROCAF 21st TFG, #6619, Taiwan. The Republic of China Air Force (ROCAF) operates the F-16V Viper, the most advanced variant of the F-16 Fighting Falcon. Upgraded from older F-16A/B models under the Phoenix Rising program, the F-16V features an AN/APG-83 AESA radar, modern avionics, enhanced electronic warfare systems, and precision weapons capability.