The drill platform was a part of the Romulan mining ship Narada that could be lowered into the atmosphere of a planet or planetoid for mining operations. Comprised of a high-energy pulse device that emitted a signal that disrupted subspace communications and transporters as well as a yellow colored high-intensity energy beam capable of burning through a planetary crust to reach the core. In 2258 of an alternate reality, it was used to drill a hole through the crust of the planet Vulcan, enabling Nero to shoot a red matter bomb to the core of the planet, resulting in its destruction by a black hole. It was destroyed above San Francisco on Earth when Spock, piloting the Jellyfish, severed the cable connecting it to the Narada with weapons fire. The platform then crashed into San Francisco Bay near the Golden Gate Bridge. (Star Trek)