On the Line-hauler with Torque Converter Hidetoshi KUSAMA, Yoshio YAMAGUCHI and Yoshio MIYAZAKI The hauling machines of the fishing nets or lines are necessary to have the characteristics of shock absorb and reliable controle of the hauling speed, especially for the large ships of tuna fishing How ever, none of old types have these two important characteristics. By the experiments, we obtained as follows; Right ordinate: efficiency of converter.

No abstract

We presented on our report I that it is oonvenient to obtain and use the di 皿 ensionless function table concemed with 出 e tenslon and configuration of towing rope ，

The problem how to economize propelling energy of ocea 皿 vessels has been studied ，三n genera1， from

Classification of Fishing Boats by the Method of Cluster Analysis Kaname SATO and Yoshio MIYAZAKI With 20 variables taken as principal items of 56 fishing boats in seven types, classification of fishing boats was made in accordance with principal components analysis and cluster analysis, in combination. Verification of result was made by using data of 54 tuna long line fishing boats not used in those analyses. As the result, an existing method of classification, that is, a method of classification, set up according to uses, proved to be a suitable one. Hence, the classification by use of the fishing boat has quite an important meaning, and the fishing boat has characteristic features essential for the performance of its function. Here, the factors such as, for example, length between perpendiculars, molded breadth, molded depth and coefficient of fineness should be considered. It is, concretely speaking, true that we can decide such factors practically only from energy saving viewpoint neglecting the use of fishing boat, but we are afraid that the fishing boat, the type of which is designed to lighten hull resistance, has, practically speaking, a serious defect in terms of efficiency required in its operation.