The encounter between the F-4E Phantom II and the F-35A Lightning II highlights the dramatic technological gap between legacy combat aircraft and modern fifth-generation fighters.
The F-4E Phantom II, which first flew in 1961, remains one of the oldest jet fighters still operating in limited service. Despite decades of upgrades and reverse-engineering efforts, Iran is believed to maintain roughly 60 operational Phantoms. While modernization has extended the aircraft’s lifespan, its core design reflects Cold War–era air combat concepts and avionics. In contrast, the F-35A Lightning II represents the latest generation of stealth fighter technology.
Its low radar cross-section, advanced sensor fusion, and sophisticated avionics provide a substantial advantage in modern aerial engagements. A key component of the aircraft’s capability is the AN/APG-81 radar, which can detect and track multiple airborne targets at distances exceeding 150 nautical miles. Reports indicate the F-35 pilot detected a formation of Iranian F-4 aircraft well before they were aware of the stealth fighter’s presence. Using a low-probability-of-intercept radar mode, the pilot—identified by the call sign “Corsair 11”—tracked six aircraft while remaining electronically concealed. Although the Iranian pilots maintained radar silence and relied on inertial navigation and ground guidance, the F-35 had already adjusted course and prepared its weapons while remaining undetected.
