Jack and Rose take the Doctor down to the ship. He says that the pilot was probably killed when it crashed, but auto-repair fixed the ship. But since nothing happened, the ship still thinks there's something wrong, so it's sending out the signal. It should just collect wind and heat and other energy, but someone tampered with it and now it only takes the life force from humans. The system is really going crazy now, because the ship thinks it's about to be rescued. The only way to stop the process is to drain the power down completely.