著者

谷 初蔵 屋代 勉

出版者

公益社団法人 日本航海学会

雑誌

日本航海学会論文集 (ISSN:03887405)

巻号頁・発行日

vol.51, pp.17-25, 1974-07-31 (Released:2017-01-15)

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It is generally recognized that the oportunities to use such conventional methods of communication as Flashing Light Signalling, signalling by Hand-flags etc. have decreased in recent years, while more modern means of radio communication have been playing the leading role on board. Turning our eyes to the actual situations in this country, we can find that application of radio telephone is so extensive that there seems no room left for use of Flashing Light Signalling which is taken up as the main subject of this paper. As is well known, the radiotelephone service, called Senpaku Denwa, established by NTT (Nippon Telegram and Telephone Public Corporation) has its service area covering practically all of the coastal Waters of Japan. Various radio communication networks, including those belonging to the VHF radiotelephone in the International Maritime Mobile Service, the Maritime Safety Agency and the fishing industry, are fulfilling their functions effectively, and their further improvements are expected. In such a situation, it will be necessary to reconsider the traditional method of Flashing Light Signalling in Japan. The aim of this paper is 1. to show the results of our analysis on the current practices of F.L.S. in Japan, 2. and to propose some countermeasures which is considered to give the best solution for the existing circumstances.

著者

谷 初蔵

出版者

公益社団法人 日本航海学会

雑誌

航海 (ISSN:24331198)

巻号頁・発行日

vol.22, pp.2-4, 1965-09-25 (Released:2017-07-12)

著者

徳川 武定 鬼頭 史城 西山 哲男 丸尾 孟 田宮 真 谷 初蔵 木下 昌雄

出版者

公益社団法人日本船舶海洋工学会

雑誌

造船協會論文集 (ISSN:05148499)

巻号頁・発行日

no.94, pp.69-79, 232, 1954-02

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As is only too well known, the quick diving is one of the essential qualities of the presentday submarines. In this paper, first of all, the authors have made an analytical study on the diving motion of a submarine. In the next, the question may be solved as to how much degree the trim angle of the vessel does alter, when the vessel submerges with constant speed Vo, along the specified course, into the given depth of immersion D, in the duration of time T, under the regulation by a pair of horizontal rudders with a certain rudder angle. Fortunate to say, we have still on hand the underwater-performance curves based on the experimental results of the several types of submarine-models, and using them, we obtained numerical values of both the trim and rudder angles of submarine when she performs the diving motion as mentioned above. In conclusion, it is shown that, if we try to make the time duration needed T, as short as possible, the allowance in inclination of hull matters more, rather than the addition of rudder angle.