This massive, slow space carrier is a triple threat. It mounts fairly heavy weaponry; it can also transport large numbers of surface attack units. In addition, it supports all X-series space combat units, refueling and repairing them, and therefore increasing their combat potency. The Runway's highly effective point-defense systems make it unlikely to be taken out by a stray shot in the heat of battle; sometimes the HC-4 will be the last survivor when both foes and allies are gone.
The HC-4 is also equipped with scanners that can detect incoming and outgoing fleets at a distance of up to 100 units.
X-5, X-6, X-7, and X-8 units have +15 DF and one extra attack when at the same world with a friendly HC-4 Space Runway.