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Published online by Cambridge University Press: 23 November 2009
This paper outlines the phase of the flight planning operation in which airlines calculate minimum-time tracks for the purpose of advising oceanic control centres of their needs prior to the definition of the Organised Track System (OTS). The results are based on 12- and 24-hour forecasts for a level of 250 mb and aircraft assumed to fly at a constant Mach number of 0·82. The problem is defined in terms of a network in which the domestic route structure on each side of the North Atlantic is represented.