Thanks for advice KirinFrost.
I tried to edit SpecialAbilities.upc for gunner accuracy and still no success.
[code]
[SpecialAbility 33]
ID=Ability-Boost-Guns
NameDisplayable=Ability-Boost-Guns-Name
Description=Ability-Boost-Guns-Description, Ability-Boost-Guns-Description, Ability-Boost-Guns-Description, Ability-Boost-Guns-Description, Ability-Boost-Guns-Description
Levels= 5
AbilityType=GunsAccuracy, GunsDamage, GunsRange, ShellDrag, ShellSpeed ;increase gun accuracy, damage and range (in percents)
AbilityValue= 20, 20, 20, 20, 40, 40, 40, 40, 40, 40, 60, 60, 60, 60, 60, 80, 80, 80, 80, 80, 100, 100, 100, 100, 100
[code\]
My gunner have %100 accuracy but still miss aircrafts.