Yes, AIR³ is also a flight computer that computes all the info required to optimize your flight during competition. With a version of XCTrack > 0.6, AIR³ generates an IGC file that corresponds to the FAI standards and therefore belongs to the instrument accepted for FAI category 1 competitions.
See XCTrack in the list of instruments of the FAI instruments list here.
Watch the Competition video tutorial
You can also find more information about competition in the competition section of the Menu/Navigation page of XCTrack Pro Manual, as well as in the details regarding Competition widgets in the Competition subsection of the XCTrack Pro widgets Manual.
After the start, the green light tells you that you can “GO”
Before the start, you can check the speed required to reach the start line and the remaining time before the start