F-4E vs Mig-29A Combat Tree sustem. 20NM Boresight lock in bad weather.

[ASW]

This is how the Combat Tree system is used. We see the transponder signal on the radar screen. The enemy is visible as a bar on the radar screen. The friend is visible as two bars. I get the enemy's altitude from the AWACS, turn on the Boresight mode, and the enemy is destroyed.)
The APX-81 picks up the IFF signals from the Russian SPO module installed on the migs, and then gives a call signal. The automatic return confirms whether the aircraft was friendly or hostile. From there, the APX-81 somehow transmits location data.

I love the Combat Tree.

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Edited 15 hours ago by ASW

[ASW]

I couldn't see the MiG at all because of the clouds, the sun, and the shadows. I flew in the wake of my AIM-7 and then fired a second missile. The first one was just to scare the MiG, but it still hit its target.

[Кош]

First, SPO has nothing to do with combat tree, RWR doesn't emit anything. 

Combat tree is a repeater of intercepted interrogator signals. It then listens to transponders.

In DCS only transponder that is vulnerable to Combat Tree IRL is on MiG-19. Everything else has later encrypted models APX-81 can't deal with.