Idea:   Each ship is assigned a "signature radius" based on X * Y * Z of their cross section. This value isn't only tied to hit/miss formula, but also to radar detection range, identification speed, and lock speed. Then create a bunch of exotic voxels as "stealth coating". Ships with this coating have a bonus for significantly reduced signature radius, and are "stealth" in the sense of the word that's used for real-life aircraft, thus creating a stealth class in DU. As in other games