How US fighter jet pilots can change a missile's target after launch

Older missiles were strictly ‘fire and forget’, meaning once they left the rail, the pilot had absolutely zero control. Today, advanced US weapons feature continuous inflight communication, allowing pilots to completely rewrite the weapon's kill chain.

Modern interceptors like the F-35 Lightning II utilise a highly secure Two-Way Data Link (TWDL). This encrypted military network allows the jet's combat computer to stream real-time coordinate updates directly to a missile moving at Mach 4.

When an AIM-120D AMRAAM is fired at a long-range target, its internal radar seeker remains switched off to conserve energy. The pilot uses the data link to quietly guide the USD 1 million missile through the sky via GPS and inertial navigation.

If a higher-priority threat suddenly appears on the battlefield, the pilot does not need to fire a second weapon. They can instantly transmit the new enemy's coordinates to the airborne missile, forcing it to abruptly change course mid-flight.

The pilot who fires the missile does not even need to be the one controlling it. A US Navy F/A-18 can launch a weapon blindly, while an invisible F-35 flying 100 miles ahead assumes control and guides the missile to the final target.

In highly congested combat zones, the risk of hitting civilian aircraft or friendly forces is immense. The two-way link allows a US pilot to instantly send a self-destruct or abort command, safely disabling the warhead seconds before impact.

Only in the last few seconds of flight does the missile finally turn on its own active onboard radar. Once this terminal seeker locks onto the enemy aircraft, the data link drops, and the weapon executes an autonomous, inescapable strike.