Board Thread:Fleet's Prepared-ness/@comment-28271983-20160424194127/@comment-27265134-20160425180332

Arzon Ong wrote:

3) May I know what is the meaning of rank 7 planes? Is it the AA stats?

Eg: Is Reppuu rank 10? Shinden Kai rank 8? etc?

Planes rank up depending on how much you use them. For attack aircraft, they lose ranks if a lot of them are destroyed in a sortie. You can read exactly how it works here. The short versions is that if you have a fighter at rank 7 it will give a bonus 25 AA regardless of the slot it is in. So, you can have fighters with less AA stats but still get a nice boost due to the Aircraft Proficiency system.