To make sure no enemy violates their airspace (and higher) the Terrans have constructed the Missile Turret. Its conception is quite simple, yet terribly effective. It fires dual rockets at anyone who would trespass into Terran territory in high-altitude, and these seeker missiles pack some firepower. As Missile Turrets were constructed to fulfill a specific role, they are incapable of striking ground units, but extremely tall ones like the Protoss Colossus can be targeted.

During Brood War, Missile Turrets were integrated with a sensor which allowed them to detect invisible or burrowed enemies within their range. This is no longer the case, as with the coming of the Sensor and Rader Towers, Missile Turrets turn into detectors only if they are in range of one of these.