日本航海学会論文集

表紙

原稿種別: 表紙
1975 年 53 巻 p. Cover1-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.Cover1

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目次

原稿種別: 表紙
1975 年 53 巻 p. Cover2-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.Cover2

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直角航法とその精度について

今津隼馬, 川本文彦

原稿種別: 本文
1975 年 53 巻 p. 1-12
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.1

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The Rectangular Navigation System is the position fixing system by the hyperbolic Line of Position (L.O.P.) and the elliptical L.O.P. which cross at right angles, decided from two stations. It is possible to display in the receiver the standard pulse, whose recurrence rate is the same as that of Loran station, with a very accurate cesium or rubidium oscillator. Distances from both stations can be computed from the time difference between the standard pulse and Loran pulses. Three kinds of L.O.P. are obtained from these distances as follows (see Fig.2): (1) two L.O.P.'s which the distance from each station is constant. -Circles. (2) one L.O.P. which the difference of distances from two stations is constant.-Hyperbola. (3) one L.O.P. which the sum of distances is constant.-Ellipse. Four kinds of position fixing modes are considered using these L.O.P.'s as follows: (1) Range-Range mode (2) Range Hyperbola mode (3) Range-Ellipse mode (4) Rectangular mode The authors compared the accuracy of these four modes with three measurement methods by the probability density of position fix and showed the results in Table 2. It showed that the Rectangular mode is the best system.

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航路設計のための海上交通容量-V

杉崎昭生, 鞠谷宏士, 桑島進, 大津皓平

原稿種別: 本文
1975 年 53 巻 p. 13-17
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.13

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In this paper, we applied our digital simulation method to the estimation of traffic capacity in a ship's channel system having a crossing part as Fig.1. In the crossing part which might give the most important influence to this capacity, we adopted fundamental navigation rules as followed. Those were ; (1) firstly that the ship under navigation in the main channel had to be given higher priority than the ship in the sub-channel, (2) and moreover that the above ship in the sub-channel had to take her rudder or use her engine to leave a enough sea room in time and place for the ship in the main one. According to our results, we could estimate that the traffic capacities in the cross type channel system were about 36, 19 and 10 ships per one hour in the sub-channel, when the mean penetrating ships into the main passage were 15, 30 and 45 ships per one hour, supporsing that all ships were standardized to the 73 meters length ship which was a predictive value of ship's distribution of 1985 judging from 1973.

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航路設計のための海上交通容量-VI

杉崎昭生, 鞠谷宏士, 桑島進, 大津皓平

原稿種別: 本文
1975 年 53 巻 p. 19-26
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.19

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The methods and its results of simulation in order to estimate the traffic capacity of some principal type in channel system were described in previous series papers. In those papers, the parameters in all condition could not be changed systematically or completely from the economical point of view in our simulation. Therefore, in this paper, the results were looked again from a viewpoint of channel design. And practical capacity which contains some condition not to be considered yet, which were the change of channel width, basic area for avoiding collison and visibility, was approached by estimation using the results of simulation. These results were applied to design some future channel systems in TOKYO bay. One of these systems is illustrated in Fig.5. From this series papers, the effect of traffic control, detailed simulation in merge and cross type channel system and development of parameter which express the degree of danger for collision were extracted as next main subjects for a design of ship channel.

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山岳による長波波面の回折について

渡辺泰夫

原稿種別: 本文
1975 年 53 巻 p. 27-32
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.27

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There are many mountains in Japan, so the phase variation by mountain should be taken into account in Decca chart calculation. A theoretical analysis as a fundamental approach to the problem has been tried. Firstly phase variation by a conical mountain, whose gradient and height are 45 degrees and 10, 000 meters respectively, are calculated. Secondly as a practical example, phase lags by Mt. UOMI, whose height is 214 meters, are calculated and then comparison between calculated values and observation data, which were obtained by Mr. YAMASAKI, Mr. TAGUCHI and Mr. SATO, has been made.

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函館におけるオメガ測定値の統計的考察-I

平岩節, 坂本有隣

原稿種別: 本文
1975 年 53 巻 p. 33-40
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.33

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Navigation with Omega in the capacity of worldwide navigation depends on the following factors: 1) the extreme phase stability of VLF signals propagated over long distances, 2) the ability to predict observed phase differences at any time of day and in any position. The authors attempted to carry out Omega phase difference observations at a fixed location and evaluated the practical value founded on the connection between the measured propagation correction and the theoretically predicted propagation correction. As an example, we observed continuously the phase differences of the A-D pair from February 1, 1974 till February 14, 1975, at the Faculty of Fisheries of Hokkaido University (41゜48'.4N, 140゜43'.3E), and discussed the results.

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小型レーダトランスポンダ

飯島幸人

原稿種別: 本文
1975 年 53 巻 p. 41-47
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.41

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The transponder is not used so efficiently at sea as in the air. IMCO recomends the use of transponder at sea and WMARC (The World Maritime Administrative Radio Conference) adopted the provisions relating to the development of fix frequency radar beacon in the maritime radio navigation service in two frequency bands. From these point of view, the author tried to produce a small and handy radar transponder using the oscillator that the author has presented before the paper "Gunn Diode Oscillator as Life Saving Apparatus". This transponder of small size and less power consumption will be expected to be used as the radar beacon, the secondary radar in the vessel traffic control, the collision avoidance of ships, the radar mark of fishing tools and etc. The fabrication of the equipment, frequency sweep, position error and the problem of fruit are discussed in this paper. And the last, the results of experiment at sea are shown.

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FRP 9メートルカッターの試作について

野本謙作, 坂平吾, 多田納久義

原稿種別: 本文
1975 年 53 巻 p. 49-57
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.49

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The design, construction and performance of a 9-metre pulling/sailing cutter for training purposes are introduced. The hull is of glass-fibre reinforced plastics with deck furnished with wood. A comparative study on performance with a conventional wooden boat is done. The fibre-glass cutter proved superior to her wooden sister in easy-maintenance, high reserved buoyancy and low drag through the water. Better sailing performance is also attempted ; equipped with a retractable centre-board ; introducing a ketch-type rig with high-pointed yards. Windward performance and manoeuvrability in going about are then much improved. Model experiment in a water-circulating channel proved useful in predicting sailing performance.

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救命艇と膨脹式救命いかだの性能比較実験-I : 水槽中における予備実験の考察

中村祐三, 伊藤良夫, 中島保司

原稿種別: 本文
1975 年 53 巻 p. 59-67
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.59

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There seem to be some differences in life-saving abilities between Lifeboat and Inflatable-Liferaft. They have been discussed widely and siriously after the Liferaft began to be adopted. To examine the differences between them, we had a preliminary living-body-experiment in the open pool equipped with wave-generator. The experiment consists of: I. Boarding test from the water II. Living test for 23 hours III. 90 minutes' living test after exchanging subjects We had many physiological and psychological data involving some interviews, and the result is: "Liferaft is more advantagious for survivors under the conditions in which the present experiment was conducted".

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Dry Container内各部の温度分布について-I

今枝彬郎, 久保雅義

原稿種別: 本文
1975 年 53 巻 p. 69-78
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.69

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The change of temperature distribution in an ocean container with time is calculated by using two-dimensional model, when outside temperature is changing. The calculated values of the temperature are considerably well agreed with the measured ones in the experiment which was made by a container (1/7-size model). This calculation system will be used to estimate the temperature distribution of various goods in the containers transported over long distance, as a means to protect cargoes from sweat damages.

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船員志向意識の動態的研究-I : 離職者について

黒田隆

原稿種別: 本文
1975 年 53 巻 p. 79-89
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.79

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Using questionnaire method, author investigated above subject. Samples were 131 Westages. The results were as follows: (1) 40% of samples did not always hope to be a seaman at the time of freshman. (2) 30% worried to go to sea through the school life. (3) 20% felt conflict in deciding their future course at the graduating stage. (4) Joining a steamship company, the aspiration as a seaman separated into three directions; positive, neutral and negative. (5) General speaking, Navigation department students were inclined to positive direction, and Marine engineer department students negative. (6) Whether their aspirations were positive or not, 85% left sea for shore in the stage of 3rd and 2nd class officer. (7) The main reasons of leaving were the hope for home life on shore, mental, and healthy maladjustment on board.

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論文集原稿執筆のしおり

原稿種別: 付録等
1975 年 53 巻 p. App1-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.App1

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講演用アブストラクトについて(論文審査内規抜粋)

原稿種別: 付録等
1975 年 53 巻 p. App2-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.App2

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奥付

原稿種別: 付録等
1975 年 53 巻 p. App3-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.App3

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裏表紙

原稿種別: 表紙
1975 年 53 巻 p. Cover3-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.Cover3

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CONTENTS

原稿種別: 表紙
1975 年 53 巻 p. Cover4-
発行日: 1975/08/25
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.53.Cover4

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