航路選定に関する一考察(日本航海学会第23回講演会)

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タイトル別名
  • A Consideration concerning the Selection of the most Efficient course
  • 航路選定に関する一考察
  • コウロ センテイ ニ カンスル イチ コウサツ

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First of all, the writer formulated statistically the trends of abatement of speeds as concerned with different degrees of ship's speeds and wind scales on the basis of the data reported formerly (tables 1, 2, 3), in cases of head wind and waves, side wind and waves, and fair condition. Secondly, he tried to consider the selection of the most efficient and econmoical routes for the San Francisco-Yokohama run and Hawaii-Yokohama run in winter, on the basis of the most frequent wind directions, the mean wind forces, the frequenties of gales (fig.4) and the aforesaid abatement of speed due to those winds and waves. Thereupon, he assumed seven courses for former run and computed the respective times required and rates of delay, and showed the results in figs.6 and 7 ; concerning the latter run, he assumed four courses and showed the times required and delaying rates in table 4 and fig.9.

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