Video: Cruise disaster: night vision footage shows Costa Concordia evacuation from the air Aerial footage from Italy's Guardia Costiera highlights the scale of the evacuation effort that was launched after the Costa Concordia struck a reef off the Tuscan island of Giglio on Friday evening. The helicopter's night-vision camera reveals hundreds of people still trapped on the 114,500-tonne cruise ship as it listed to an 80 degree angle. Lines of passengers are seen lambering down the hull of the capsized vessel into waiting lifeboats as many more await rescue atop the ship. 4,200 passengers are believed to have been on-board when the ship ran into difficulties. Six people are so far confirmed dead. Authorities on Tuesday night almost doubled the estimate of the number of passengers and crew still missing, from 16 to 29, after German authorities said that checks had shown 10 of their citizens were still missing. The ship's captain, Francesco Schettino, was arrested a day after the disaster. He is accused of manslaughter and abandoning the ship and is due to appear before magistrates for questioning today.