Tactical missile defense. Protection is limited to the structure's operational area.
Time is 400 build points divided by build power. Drain is mass and energy per second while it is building, so more build power finishes sooner and costs the same total, but pulls harder on the economy.
Not the same weapon as the other three. Every faction’s tactical missile defence costs 280 mass, but the UEF, Cybran and Seraphim ones fire a tracking interceptor that does 1 damage every 1.8 seconds out to range 31, while the Aeon one lobs a drifting flare that does 30 damage every 4 seconds out to range 24, does not track its target, and falls under gravity. It also has 500 health where the others have 950 to 1000. So it is placed tighter, dies faster, and does not answer incoming fire the way the others do.