Pirate Infra Red System

Invaluable in dogfights, the IR image shows you what the target is up to. With the radar in Stealth Mode, you can use the IR system to execute sneaky rear attacks with the ASRAAM.

From the manual -

" At ranges of around 20nm, the PIRATE Infra Red Search and Track (IRST) comes into its own. This sensor detects heat emissions from targets and is passive, which means that it emits no signals that could give away your position, unlike the radar. Information from the IRST on enemy positions is integrated with the radar signals and appears on the same MFD. IRST is also capable of providing TV-like images which aids in aircraft recognition. "