Shocking footage of the terrifying moment the Costa Concordia passengers had to clamber down to lifeboats in the dark on a single safety rope has emerged. The Italian Coastguard took footage of passengers waiting in the freezing cold .The survivors the young and the elderly were reportedly 'abandoned by crew' . The incredible infrared footage shows survivors slipping down the belly of the stricken Costa Concordia one-by-one using a rope. The black-and-white video, taken by the Italian Coastguard, shows passengers queueing up to get into lifeboats.