日本航海学会論文集

表紙

原稿種別: 表紙
1972 年 48 巻 p. Cover1-
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.Cover1

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目次

原稿種別: 表紙
1972 年 48 巻 p. Cover2-
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.Cover2

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ロラン・天測両船位の相対誤差について

和気博嗣, 樽美幸雄

原稿種別: 本文
1972 年 48 巻 p. 1-8
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.1

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Loran and celestial observation are widely used to fix a ship's position on the ocean. The authers have been studying the measurement error from the point of view of the relative error, which is the difference between Loran fix and celestial observation. The questionnaires were sent out to Shipping Companies of Japan. The correlation was investigated between relative error and other factors with the technique of Multivariate Statistical Analysis. The analyzed results thus obtained is presented.

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確率楕円体および確率球による三次元位置決定誤差の計算法

西周次

原稿種別: 本文
1972 年 48 巻 p. 9-16
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.9

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Three dimensional position fix in the field of sea navigation has become very important because of the development of satellite navigation system. However it seems that three dimensional error analysis has not sufficiently studyed. This paper presents computation procedure of three dimensional position fix error assuming that all obserbation errors have normal distribution. Error distribution was defined as the probability ellipsoid and its three principal axis radii were calculated. For the purpose of practical application, author defined 95% probability sphere and its radius was also calculated. Table, chart and approximate equation which determine radius of 95% probability sphere from three principal axis radii was obtained.

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レーダ避航法-II

今津隼馬, 杉崎昭生

原稿種別: 本文
1972 年 48 巻 p. 17-22
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.17

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It is necessary for navigator to know the present risk and the maximum future risk at the avoiding method in Radar Navigation and it is not enough to decide the present risk and maximum future risk with only distance between two vessels. The writers defined Admissible Time (A.T.) as follows: A.T. is the amount of distance divided by approaching component of a relative vector, and considered the risk using this A.T. and distance. According to the consideration, it can be obtained that the risk is closely related to approach speed and when the approach speed is fast the risk should be represented by A.T., while the approach speed is slow the risk should be represented by A.T. and distance.

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レーダにおけるSea Echo除去装置の試作

鶴田末一, 大條広, 北隅一紀

原稿種別: 本文
1972 年 48 巻 p. 23-32
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.23

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Operating usual marine radar, the capability of the radar is often markedly lowered by the interferences of back-Scattering sea clutter noises. To plan the rejector of the sea clutter, we firstly made fundamental experiments qualitatively evaluating radar beam reflection due to water wave. Secondly, we made the device including the circuit to reject the interferences and equipped this to the radar established in the compound of Kenzaki light house. The results of the experiment with it will be described below.

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救命用ガンダイオード発振器の研究

飯島幸人

原稿種別: 本文
1972 年 48 巻 p. 33-42
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.33

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In case of a disaster, it is very difficult for the rescuer to find lives swimming or on a boat even from close distance. In such a case, if a man has a small microwave oscillater he will be easily found by a radar and saved his life. In this respect, there is, at a present time, a considerable interest in a life saving microwave oscillator used a solid state generator such as Gunn diode. The purpose of the auther's study was to produce a small microwave oscillator by way of experiments and to find the basic conditions for the design standard of a life saving oscillator used at sea, and still more to assess the possibility of its practical use.

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おしよろ丸の風圧力に関する風洞実験

平岩節, 稲葉恭人, 坂本有隣

原稿種別: 本文
1972 年 48 巻 p. 43-48
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.43

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Our working group have studied on ships' drift when their engines were stopped. Though a ship's drift on the ocean is affected by the force of the wind on the upper structure of the ship and her rolling caused by swelling waves, we can not separate them. In order to pick out the drifting by wind action, we carried out the wind tunnel experiments with an image model of the above and under-water portions of the Oshoro Maru, a fishing training ship of Hokkaido University. Consequently, we obtained the distance, and direction of the drift due to wind action, and furthermore discussed about the effect of the rolling caused by swelling waves by comparison with the data of the actual drifting on the ocean.

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おしよろ丸の漂流について

平岩節, 藤井武治, 山本昭一, 増田紀義, 石井清彦, 米田国三郎

原稿種別: 本文
1972 年 48 巻 p. 49-56
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.49

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Measurements of the drifting distance and direction of a ship, while its engine is at full stop, were made by several means. For example, the authors made the experiment with the drifting of the Oshoro Maru, a fishery training ship of Hokkaido University, in the Bering Sea, and tried to express the direction and distance of the drift by parameters with the ship's head, trim and wind velocity. The experiment 1. The corner reflector connected to a drift net was selected as the datum point of the experiment. In this case, the reflector was allowed to drift together with the ship according to currents and waves, but it felt no effect from the wind in spite of the movement of the ship. 2. The observers on the ship measured the distance and the bearing of the reflector by radar every 30 minutes and calculated the drifting by solving the triangls. The results 1. The relation between drifting velocity (Ukt) and the ship's head (α゜), condition (√<S_α/S_W>), trim (tcm), and wind velocity (Wm/s) is expressed by the following equation. U={0.116+48.37e^<-0.051t>-(0.000097+0.0417e^<-0.031t>)α}√<S_α/S_w>w 2. The direction of drifting (β°) is expressed by the empirical equation. β=(-113.4+0.626t)+(3.117-0.00886t)α 3. Consequently, if one knows the drifting characteristics of his ship, he can estimate the position to which the ship has drifted.

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逆スパイラル試験の中・小型船への適用について

久々宮久, 師岡洋一

原稿種別: 本文
1972 年 48 巻 p. 57-63
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.57

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For the purpose of ascertaining characteristics of course stability, the spiral test originated by J. Dieudonne [1] has frequently been used. Main defects of this test are: (1) it requires broad sea room, (2) it takes very long time, and (3) it has to be performed only under the limited weather and sea conditions. On the other hand, ship forms are continuously becoming more and more huge and gross, and course instability has become an urgent problem in the field of naval architecture. Few years ago, Mogens Bech proposed a testing method using the rate gyro to obtain the relation between r and δ in the form of δ=δ(r). This method is called reversed spiral test, and with this new technique, data connected with course stability for giant ships have been accumulating. The authors tried to apply Bech's method to three smaller vessels, namely 3463 G.T. (A), 1643 G.T. (B), and 331 G.T. (C), and to ascertain whether or not the merits of the new method are valid for these ships. Our conclusions are as follows ; (1) Sea room and duration for a test required did not change remarkably with ship A and ship B, (2) Our attempt to obtain the detailed characteristics of the inside of hysteresis loop (ship C is known as unstable) was fruitless. (3) To gain the general view of r-δ curve, Bech's method is suitable for these ships.

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96屯型鮭鱒流網漁船の復原性について : I 出港時の傾斜および動揺試験結果の解析

川島利兵衛, 稲葉恭人, 天下井清

原稿種別: 本文
1972 年 48 巻 p. 65-68
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.65

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This is the study on the safety of the salmon fishing boat in a seaway and fishing field. Concerning on the 7 fishing boat which were built between from 1963 to 1968 by the different shipyard, the heeling and rolling tests were performed by the author. On the other hand, the 2 meter length fishing boat model ship were used for the assumption of the various coefficients for the given condition of the fishing boat. Based on those data, the empirical formula were deduced and discussed. On these results, the author discussed on the statbility of the 96 ton type salmon fishing boat. Then, by the use of non-lenear equation of rolling motion of this type of ship, the author discussed on the solution of this equation.

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警報音の船内伝搬特性

藤井忍, 小黒英男, 沢田博史

原稿種別: 本文
1972 年 48 巻 p. 69-75
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.69

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This study was made to investigate the propagation property of alarm signals, and to abtain basic data of the arrangement of alarm in ships. The summary of the results is shown below. The distribution of signal sounds in room and passage, are calculated by the equation (1) and (2), but in the case of the rooms where are built the great machinery, can not be obtaine dby the equation. (1) In long passage, Bell of diameter about 120 milli-meters and equivalent alarms will be arranged with separation, distance less than 10 meters.

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避航の判断と操船者の特性

長畑司

原稿種別: 本文
1972 年 48 巻 p. 77-85
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.77

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It is the purpose of this paper to deal the characteristic of navigators on the maneuvers for avioding collision in connection with the sense of sight or time and the evading distance △L. △L is the remainder of DCPA in beginning and completion of avoiding maneuver. It becomes clear by analysis of the radar filmes that △L has following with R, R, V and m; |△L|≦k (R, R, V, m)+h where R, V and m are respectively the relative distance, relative velocity and DCPA of the two vessel at beginning of maneuver for avoiding collision, and k and h are constant. A navigator is not likely to be sensible of the relative bearing velocity of the privileged vessel and the experiments about his sense of distanse at sea were performed.

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巨大船の動作に関する法的考察

長沢彰三

原稿種別: 本文
1972 年 48 巻 p. 87-93
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.87

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The stand-on vessel shall make such preferable actions as will be the best aid ways to avert collision, but it it difficult to determine when the time has arrived for the master of a vessel to take action. I am afraid that if a very large vessel (stand-on vessel) complies fully with the provison of Rule 21 (after part), might not be able to avoid collision. I hate to make a sweeping generalization, but would say that the large vessel must take action earlier to avoid collision.

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関門海峡通航船に及ぼす潮流の影響 : 特に衝突海難との関係について

神鳥昭

原稿種別: 本文
1972 年 48 巻 p. 95-105
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.95

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Frequent collisions occurred yearly in the Kanmon Strait, because of difficulty in navigating due to the frequent traffic passing along the curved fairway in the narrow channel with the strong tidal current. For the qurpose of offering the basis of the marine traffic improvement of this area, the present report first dealt with the phenomenal relation between the tidal current and the frequency of collisions occurred in 1962 to 1969. And for the purpose of proceeding to the analysis, second, the relations between the tidal current and the following three traffic factors observable in the short term traffic surveys were examined: Traffic volume, sailing speed, and the rate of the ship passed along the illegal routes.

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粒・粉体貨物の荷崩れ現象の基礎実験

阿部武夫

原稿種別: 本文
1972 年 48 巻 p. 107-115
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.107

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The problem of shifting sights on grain and flour cargo can not decide by theory except by experiment, especially on flour cargo. This experiment's reports are statical and dynamical datum dueing variable humidities. The dynamical conditions are changed by list and rolling period mechanically.

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狭水道間交通係数

平野新太郎, 榊正三, 萩野芳造, 嶋田和治

原稿種別: 本文
1972 年 48 巻 p. 117-126
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.117

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In order to study the aspect or marine traffic, we must study the ralation between the traffic of each channel, not only to know the traffic in every channel individually. But there are so many channels available for marine traffic in the Inland Sea and the combination between them would be several hundreds. Therefore it is very hard to study the activity of the traffic in each channel quantitatively. We try to give the proper separate co-efficient for each channel traffic and traffic co-efficient between two channels (giving the name of reciprocal traffic co-efficient) and make up the whole traffic appearance combining these traffic co-efficients. This paper proposed that the way of finding these co-efficients and giving the formulae of marine traffic flow between channels using these co-efficients and comparing calculated value of traffic with observed.

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群れをなして錨泊している船の分布について

巻島勉

原稿種別: 本文
1972 年 48 巻 p. 127-133
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.127

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If all the ships are positioned at random, the expected value of the distance from each ship to the nearest Nth ship is [numerical formula] Where μ is the number of ships per unit area. And we see that E[γ_2]/E[γ_1]=1.5 On the contrary, if all the ships are arranged in honey-comb pattern, the nearest 6 distances are equall each other and these are γ_<1〜6>=1.075/√μ Radar display at Tokyo Bay is photographed on 13 June, 1972. On these photos, the distances from each ship to the nearest Nth ship is measured. And E[γ_2]/E[γ_1] is calculated to be 1.22. From this, we can conclude that the state of the distribution of ships at anchor in group is between random and the honey-comb pattern. The states at Yokohama quarantine anchorage and Shimoda harbour are also showed.

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船舶交通流におけるシミュレーション結果の評価とその推定について

山田一成, 田中健一

原稿種別: 本文
1972 年 48 巻 p. 135-138
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.135

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A simulation study is made with assumptiont that (1) the traffic flow is steady and (2) the distribution of ship size is constant to examine the fair way plan in Tokyo Port. The distribution of time lengths necessary to go through fair way is abtained. The influences of traffic density, presence of buoy sc. on the passtime are investigated and result indicates the probability to represent relation ships of the passtime and the parameter of hyperglometric distribution which is determined by the traffic density.

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閉塞領域に関する二,三の要因について

田中健一, 山田一成

原稿種別: 本文
1972 年 48 巻 p. 139-146
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.139

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The estimatin of the marine traffic capacity requires the determination by the observation for the effective domain, which was carried out on the Choshi Harbor. Using the statistical manipulation of the obtained data, effects of ship group size, ship speed and waterway's widths on the effective domain are clarified. Furthermore, the traffic capacity in the high speed range of ship is represented by the following formulas C=η<WV_0>/L^2, η=0.219±0.046, where C is the traffic capacity, and W, V_0 and L are waterway's width, speed and length of ship respectively.

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閉塞領域の一考察

杉崎昭生

原稿種別: 本文
1972 年 48 巻 p. 147-154
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.147

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As the term occlusive area is not defined so clearly in the marine traffic engineering, then the author defined the occlusive area from a point of ship maneuviring taking account of the characteristics of marine traffic flow in Japan. According to his definition, the occlusive area is a void area enclosed by the envelope of tracks of ship's relative motions around a certain ship. In this paper, some occlusive areas are shown using data obtained by radar. Qualitatively speaking, the shapes of the areas are similar to the shapes composed of stream-lines which can be seen in the fluid with ship-shape body, for different meeting conditions ; e.g. encounter, crossing and taking over.

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奥付

原稿種別: 付録等
1972 年 48 巻 p. App1-
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.App1

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裏表紙

原稿種別: 表紙
1972 年 48 巻 p. Cover3-
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.Cover3

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CONTENTS

原稿種別: 表紙
1972 年 48 巻 p. Cover4-
発行日: 1972/12/20
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.48.Cover4

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