RESEARCH ARTICLE No second-in-command: human fatigue and the crash of the airship Italia revisited Gregg A. Bendrick1 & Sergio Alessandrini2 1Aeromedical Certification Division, Civil Aerospace Medical Institute, Federal Aviation Administration, Oklahoma City, OK, USA; 2Geographic Research and Application Laboratory, European University of Rome, Rome, Italy Abstract Keywords Polar exploration; aviation history; airship; The dirigible Italia crashed onto the Arctic sea ice north-east of the Svalbard human factors; mishap archipelago on 25 May 1928 at 10:33 GMT while travelling back to her base from the North Pole. Only eight of the 16 crew members survived: one was killed Correspondence upon impact, one did not survive the post-crash ordeal and six were trapped in Sergio Alessandrini, Via degli Aldobrandeschi the airship envelope (i.e., the balloon), which floated away and disappeared. No 190, 00163 Rome, Italy. E-mail: sergio. definite conclusions have ever been reached about the causes of the crash. The
[email protected] judgements of the Commission of Inquiry instituted by the Italian government and published in 1929 are carefully examined. Recent analysis has presented evi- Abbreviations dence that the mishap may have been fatigue-related. In this paper, the pivotal CDUN: Umberto Nobile Documentation Centre question of why General Nobile was so sleep-deprived at the time of the accident MM: Ministero della Marina (Navy Ministry) RSGI: Italian Royal Geographical Society is addressed, specifically with reference to the lack of a second-in-command (i.e., SIC: Second-in-command a deputy commander) during the flight. Such a position was a standard practice for airships at the time, and General Nobile himself described this position as one necessary for an airship.