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Article type: Cover
1964 Volume 31 Pages
Cover1-
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Article type: Cover
1964 Volume 31 Pages
Cover2-
Published: July 25, 1964
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Kiyoshi Kawakami
Article type: Article
1964 Volume 31 Pages
1-3
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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The Japanese Charts No.1065 "Tokyo" (1/11,000), No.1155 "Niigata Ko, Inner Harbour" (1/15,000 and 1/7,500), No.90 "Tokyo Kaiwan" (1/100,000) and No.159 "Hi-no-Misaki to Saruyama Misaki" (1/500,000) have been experimentally revised by the author, based on the following new ideas: 1. That larger scale charts are to be used solely for navigation. 2. That smaller scale sharts are to be for the mariner's exclusive use, showing detailed information on bars, shoals, etc. in the offing. 3. That those objects, which can only be charted with such less accuracy that they are undesirable for navigational use, are to be omitted. 4. That the hydrography of the area already shown on a larger scale chart is to be omitted from the smaller scale chart including the area.
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Yoshimasa Namikawa
Article type: Article
1964 Volume 31 Pages
5-9
Published: July 25, 1964
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M. Kato, K. Minohara, Y. Maniwa, T. Hashimoto
Article type: Article
1964 Volume 31 Pages
11-17
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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The Tele-Sounder, now produced as a trial model by us, is designed to set a recorder at a land station and to transmit ultra short wave frequency-modulated by pulse signal, by operating the recorder, which are recovered by the buoy station set in the remote water surface. The buoy station transmits and receives ultra supersonic waves directed into the sea, transmitting ultra short wave frequency-modulated by the information signals to the land station, and the recorder at a land station records the midwater situation directly under the buoy. The Tele-Sounder is fully transistorized to make compact and light. The tests on the sea has resulted in the following data. 1. The fidelity of acquired records is excellent. 2. The transmitting distance between the land and buoy stations is up to 4.5Km on the sea (42MC band, transmission power is 100mW). 3. As the status of fish group coming into the set net has been clearly observed, when we tried to fit buoy station in the opening of set net, it is expected to be further applied in the set net fishery.
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T. Sumi
Article type: Article
1964 Volume 31 Pages
19-23
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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A study was made on radio navigational aids to be intended for use to small ships sailing on the inland sea. For such ships, active guidances for their navigations are to be given, especially when they sail through the narrow channel and a cirtain one-way radio telephone system may be used for this purpose. However, it will not be expected for them to equip any particular installations to receive the navigational aid alone. The ordinary broad-cast receiver will be only means to be utilized. One method is presented here to give the broad-cast receiver the adaptation necessary to receive the radio wave of the navigational aiding system automatically when it is on air.
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T. Sumi
Article type: Article
1964 Volume 31 Pages
25-29
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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An analysis is made on informations obtainable from "Look-out", concerning to preventions of ship's collisions. The measure of expectations of the collisions is defined and presented as a function of the distance and the azimuth of the other ship in the form of A(1+cos2θ)/R. The form of this function suggests the look-out by human eyes to be superior to the Radar look-out.
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Yukiya Maehata, Yumio Yonezawa
Article type: Article
1964 Volume 31 Pages
31-40
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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The suitable adjustments make the auto-pilot exhibit sufficiently its performance and the effective automatic steering of the ship possible. Consequently we require them according to the manoeuvering indicies that vary with the ship's condition. This paper takes the transfer function appling the manoeuvering indicies, analyzes it by frequency response method, and describes the method that finds the most suitable adjustment. To find it we propose the investigation of the transient response in changing the ship's course under automatic steering. We will not treat here the non linear elements, but analyze only the linear elements included in the auto-pilot.
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Y. Nishitani, Y. Yonezawa
Article type: Article
1964 Volume 31 Pages
41-45
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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When the distance between two transmitting stations, master and slave, is too long or there is the ground between them, in some region it is impossible for us to receive both ground waves from the two stations and yet two effective sky waves cannot be received because the distance from one station is less than 250 nautical miles. In these special regions, it is required to determine the Loran fix by the time difference between the ground-wave from one station and the sky-wave from the other. In such a case, special correction must be applied. The probable error of these correctiom due to the variation of ionospheric height in short period was described, however the effect of gradual change of its average height was not reffered. The purpose of this papar is to study the changes of special corrections due to the gradual change of the ionospheric hight and thir effects on the Loran fixes.
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Y. Takeda, H. Okazawa
Article type: Article
1964 Volume 31 Pages
47-52
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Nippon Kaiji Kyokai has performed several amendments on thier rules of the classification of vessels. Especially, rules for electrical installations have been widely revised, by the reasorn of the adoption of automatic control systems. Hereby, explanations are presented, focused on the following provisions : the regulation for cargo gear and the numbering procedure for control epuipments.
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T. Nakano, I. Sakagami, M. Nakazatomi, H. Okita
Article type: Article
1964 Volume 31 Pages
53-59
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Due to many factors of wear and tear of cylinder liners, it is difficult to determine its exact causes. Therefore, we must first attempt to verify the various causes of wear. First inspection will be the effect of lubricating oil against class A and B heavy oil.
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Y. Nakajima
Article type: Article
1964 Volume 31 Pages
61-70
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Polyethylene rope is an artificial fibre producted by chemical process and it is much surperior in most respects to any cordages made from vegitable fibres. On the other hand, its properties have some weak points on stretch, friction and heat. Then we had made an actual test for its usage. From the results of test, the following points were clearified. 1. Splicing should made by more than 4 tucks. 2. The length of rope can be stretched nearly by 50 percent. 3. We obtained the coefficient of friction between 0.143-0.245.
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T. Makishima
Article type: Article
1964 Volume 31 Pages
71-75
Published: July 25, 1964
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In conventional navigation, the fix is obtained by drawing work on the chart. This will be an obstacle from the viewpoint of automation of navigation. If we obtain the fix by calculation and have an appropriate calculator for that porpous, then we can get the fix briefly and quickly. The author here shows the methods to obtain the cross bearings fix and astronomical fix by calculation.
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S. Sakaki, M. Horiuchi
Article type: Article
1964 Volume 31 Pages
77-91
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Many factories of heavy industry are extending to the sea side of the bay or the inland sea in Japan. I specially investigate many small crafts traffic in the Inland sea of Seto sailing for transport between those factories and cities. They are sailing under the tidal current and make a distinctive character of traffic. Some perhaps effect for the course of sea disaster. Here analize some tipical type of small craft traffic in the narrow channels and the effect of current sailing by choosing departure time according to the current.
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S. Harada, G. Kusunoki, K. Shoji, H. Kugumiya
Article type: Article
1964 Volume 31 Pages
93-98
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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One of the authors has manufactured for trial the electric computer to solve the vectorial relation in 1957. This time we improved on the many parts of this computer and had attached an indicator of cathode ray tube to this computer. Then the navigators can easily pass fair judgment.
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Rihei Kawashima
Article type: Article
1964 Volume 31 Pages
99-106
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Usually fishing boats or research ships drift among ocean waves and stop their engines during their operation in fishing or oceanographic work. It would be valuable to investigate the rolling response of the vessel to ocean waves for the purpose of safety performance of operations while stopping at sea. As a matter of fact, it is very difficult to determine the characteristic of ship's response to motion actually in the sea by means of compulsive forces which are given artificially. If there is a way to get the characteristic response of the ships to the motions by measuring ocean waves and ship motions in actual sea, this will be the most useful method of studying the ship's motions in a seaway. This paper describs the way of the above mentioned motions using model ship experiments which were performed in an experimental tank in which waves were produced by the irregular wave generator as in a seaway. The characteristic for the ship's rolling motion was deduced by analysis of the stochastic process on the results of observation, using cross correlation coefficient for wave slopes as input forces and rolling angles as out-put forces in the ship's dynamical system.
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K. Yoneda, T. Nohara, H. Tani, H. Kikutani, A. Iwai, K. Oikawa, H. Kug ...
Article type: Article
1964 Volume 31 Pages
107-119
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Article type: Appendix
1964 Volume 31 Pages
App2-
Published: July 25, 1964
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Article type: Cover
1964 Volume 31 Pages
Cover3-
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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Article type: Cover
1964 Volume 31 Pages
Cover4-
Published: July 25, 1964
Released on J-STAGE: September 26, 2017
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