A measure of the ship's resistance to enemy fire. Its main component (and in early hosts, the only component) is the ship mass. Some bonuses are added to this: the engine-shield bonus (used to reflect that better engines give better shields), the Fed crew bonus, and the infamous 360 kt bonus to balance carrier fights.

This is a testing version.
It may be incomplete, and have more bugs (or features) than the public live version at planetscentral.com.