Ship based weather routeing (using dynamical meteorology)
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The relevance of ship based routeing is discussed. Data collected at sea are analysed to produce vessel response characteristics Meteorological data are analysed in a conventional manner to establish effective steering criteria with respect to 500 mb flow. For the first time a routeing model is formulated which recognises the three spatial dimensions of a middle latitude storm. A theoretical analysis of relative flow in a growing baroclinic wave is undertaken. Reference to displacement of the wave trough affords a measure of both storm development and steering effectiveness. Short, medium and long term planning elements are combined in a model. The effectiveness of this approach is demonstrated by actually "weather routeing" a vessel, whilst comparing progress of a sister ship navigated conventionally. Sources of error and limitations of the model are discussed.
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