No no warning at all. The only thing that can give you a warning with the old missile at least is the engine leave a smoke trail so you have to look around and

No no warning at all. The only thing that can give you a warning with the old missile at least is the engine leave a smoke trail so you have to look around and you may dodge it. The thing is compare to radar, for IR since your aircraft already emit them from the heat the IR tracking system doesn’t need to emit anything but only to receive. So there is no way to detect that someone is « locking » you. You are already emitting your own lock from your own heat the enemy just need to have the tool to see you.