Proceedings of an international symposium held at the National Maritime Museum, Greenwich, in April 16-18, 1980. Contains the papers: Energy Requirements in Health by J. V. G. A. Durnin; Victualling of the Fleet in the Eighteenth and Nineteenth Centuries by C. C. Lloyd; Vitamin Requirements of the Human Body by I. M. Sherman; Two Hundred Years of the Sailor's Diet by G. J. Milton Thompson; Clinical Manifestations of Vitamin Deficiencies by G. Taylor; Some Consequences of Nutritional Disorders in Eighteenth Century British Circumnavigation by J. Watt; Eighteenth Century French Voyages of Exploration: General Problems of Nutrition wh=ith Special Reference to the Voyages of Bougainville and d'Entrecasteaux by A. Carre; Health and Navigation in the South Seas: The Spanish Experience by J De Zulueta and I. Higueras; Doctors Abroad, Medicine and Nineteenth Century Arctic Exploration by R. E. Johnson; By Want Beleaguered, Sir John Franklin (1786-1847) in the Canadian Arctic by R. E. Johnson; The History and Implication of Processed Food by A. E. Bender; Hypothermia by W. R. Keatinge; Nutritional Aspects of the British Arctic (Nares) Expedition of 1875-76 and its Predecessors by A. Savours and M. Deacon; The Influence of Diet in Scott's Last Expedition by A. F. Rogers; Nutritional Deficiencies in the Crews of German Raiders in Two World Wars by H. Schadewaldt; Neurological Factors in Decision-Making by W. Goody.