The habitat is constructed using much the same materials as the hull plating - laminated materials, alternating between sheets of tungsten and high-density foam. The tungsten absorbs any impact caused by a projectile as it is penetrated. When the tungsten fails, it transfers the energy of the projectile into the fragments of tungsten. These pieces are restrained by the foam, which absorbs the energy. The habitat's hull also acts as a Faraday cage, grounding most electromagnetic signals that enter the habitat and preventing their interference with delicate electronic equipment. The Habitat's antenna protrudes from this Faraday cage to allow for the reception of radio communications.