"Why O? Well, it stands for "OH SH*T!", since the enemy will probably say that quite a bit after seeing it" - Derek on the O-Fighter's name.
Deron War Craft's O-Fighter is a complex craft that takes advantage of the fact that there is no intertia in space to make incredibly advanced maneauvers. It is based on the Q-Fighter-2 in it's design. It is basically a cube, with rockets attached to every side. This allows it to make hairpin turns and other incredible maneuvers.