The aerobatic box as defined by the <a href="https://en.wikipedia.org/wiki/F%C3%A9d%C3%A9ration_A%C3%A9ronautique_Internationale" class="extiw" title="en:Fédération Aéronautique Internationale">Fédération Aéronautique Internationale</a> for use in competitions. The box is 1km by 1km by 1km, with the altitude of the lower face being set depending on the type of competition. The box is orientated according to wind direction, and the judge stands on the cross wind axis. Leaving the box causes penalty points to be deducted during competition.
<a href="//commons.wikimedia.org/wiki/User:Mehmet_Karatay" title="User:Mehmet Karatay">Mehmet Karatay</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>