日本航海学会誌

表紙

原稿種別: 表紙
1960 年 22 巻 p. Cover1-
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_Cover1

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目次

原稿種別: 表紙
1960 年 22 巻 p. Cover2-
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_Cover2

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深江丸の増減速前後進時における主機械の操縦について(日本航海学会第22回講演会)

橋本淳, 片山雅宏

原稿種別: 本文
1960 年 22 巻 p. 1-11
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_1

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This paper shows that the effects influencing many factors in the motion of acceleration and crash backing of a diesel direct driven vessel due to the different kinds of the operation of the engine maneuvering were analyzed by calculation. The training ship "Fukae Maru" in Kobe University of the Mercantile Marine was used for the example of calculation. The operations of the engine maneuvering are shown as the two equations which are that of dF/dt=const. and of dn/dt=const. (F=engine torque, n=shaft revolution, t=time). The calculation was done under some assumptions and it's result, however, made us notice such basic hints as shown following for the study of the engine maneuvering in a diesel direct driven vessel. (1) In acceleration the increase of (n) always loses against that of (F). Consequently in case the maneuvering on the condition of dn/dt=const, and dn/dt=0 some time later is operated, we notice (F) has a distinguished peak. (2) In case of crash backing and shaft crash reversing, the increase of (n) does not lose against that of (F). In case (F) is fixed constantly some time later, we notice (n) gradually decreases and in case (n) is fixed so, we notice (F) increase at the beginning and gradually decrease through the maximum point. (3) In case constant starting torque is acted, the change of the conditions when the shaft revolution is increasing depends greatly on the ship motion on that time.

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同期発電機並列運転シンセシスの一方法(日本航海学会第22回講演会)

森下隆, 永田嘉章, 西角昌也

原稿種別: 本文
1960 年 22 巻 p. 13-19
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_13

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練習船における集団教育方法の研究(1) : 主として実習生集団士気の測定法について(日本航海学会第22回講演会)

北川視朗, 大沢文男, 原田義彦, 兵藤庄治, 岡島勉

原稿種別: 本文
1960 年 22 巻 p. 21-30
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_21

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In this paper, we attempt to introduce an outline of our Questionnaire, and show the reliability and validity of our educational point of view. We also suggest the basic mechanisms of group dynamics connected with them.

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練習船における集団教育方法の研究(2) : 実習生の関心の所在(日本航海学会第22回講演会)

北川視朗, 大沢文男, 原田義彦, 兵藤庄治, 岡島勉

原稿種別: 本文
1960 年 22 巻 p. 31-39
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_31

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以上をまとめれば、一般大学生と大差はないが、第8表および、第3図の心配の原因と比較す[figure]ると、商船大学生は経済観念がうすいように思はれる。又、自己の関心については、航海科2学年以外は低く、将来の自己の職業に対する関心が多い。これを分析してみると第16表のように、長期実習になると特に船員生活に対する関心が多く出ていることがめだつ。[table]今後、集団教育の実施にあたり、実習生の関心領域が、どのような反応と傾向を示し、実習生の精神構造の一端を科学的に分析して、これにもとずいて適切な指導を行ないたい。

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経営規模および職務内容からみた船員の傷病(日本航海学会第22回講演会)

西部徹一

原稿種別: 本文
1960 年 22 巻 p. 41-48
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_41

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It was noticed the smaller the scale of business of shipping companies, the high the frequency of disembarkation of seamen due to diseases and injuries. This fact suggests the unfavourable working conditions in small enterprise. Regarding the relationship between morbidity and working conditions, the following points attracted the author's attention: 1. The incidence of tuberculosis was evidently high in those engaged in light work or taking the night shift, especially the midnight. 2. In the engine and catering department, vitamin B1 deficiency, diseases of vein and urogenital system were more frequent. 3. The incidence of neuropsychosis was higher among radio officers and engine officers. 4. The accident rate of sailors was the highest among all due to cargo work. 5. The morbidity rate in the engine department decreased remarkably in the past several years.

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超音波音響測深機に関する二三の技術的考察 : 測深能力の図式解法と二周波式音響測深機について(日本航海学会第22回講演会)

橋本富寿, 熊凝武晴, 藤原潤一

原稿種別: 本文
1960 年 22 巻 p. 49-54
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_49

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We give in the following the new practical method by virtue of diagram solution for finding out fathomability of echo-sounders which in other way can be calculated and furthermore mention about the future perspectives of echs-sounders being quite probable employing two different frequencies considering about directivity of transducer element and propagation characterristics with respect to frequency.

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風洞実験水槽について(日本航海学会第22回講演会)

鮫島直人, 横田利雄, 岩井聰, 米田謹次郎, 野原威男, 岡田正明, 鞠谷宏士, 川本文彦, 及川清

原稿種別: 本文
1960 年 22 巻 p. 55-58
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_55

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In order to make a research on the motion of a ship at anchor in a strong wind, we have recently made a water-tank combined with wind-tunnel. This installation can blow a steady wind of 7m/sec at maximum in the windtunnel and set afloat a model ship of one meter in length on the water of the tank, 3 meters in length and 4 meters in width, topped with the wind-tunnel.

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荒天錨泊法に関する実験研究(第1報) : 単錨泊について(日本航海学会第22回講演会)

鮫島直人, 横田利雄, 岩井聰, 米田謹次郎, 野原威男, 岡田正明, 鞠谷宏士, 川本文彦, 及川清

原稿種別: 本文
1960 年 22 巻 p. 59-69
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_59

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This paper is the report of experiments on ship's motion riding at single anchor using a model ship of the Nissei Maru, one of the typical cargo three islanders. The experiments were carried out by means of the water-tank combined with the wind-tunnel mentioned in the above thesis. The results of the experiments have shown us that the following fscts are recommendable in decreasing the ship's yawing motion and minimising the shock load on the anchor chain. 1 It is better to increase the ship's displacement, that is, to make her full-loaded if possible. 2 It is better to trim by the head. 3 It is better to make chain cables as heavy as possible.

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ロラン空間波補正値について(日本航海学会第22回講演会)

山崎真義

原稿種別: 本文
1960 年 22 巻 p. 71-75
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_71

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The measurement of corrections of the Loran sky wave was carried out by Loran rates 2S1 and 2S2, on the sea at the eastern part of Japan in August, 1959. The following are results from comparison of delay times observed with those obtaind from the empirical formula. 1. Curves of the measured values at any day differ from the one by the empirical formula, but the mean of all data looks to agree nearly with it. 2. Probable errors of the delay times are 10.2^^<μs> at the position 291 miles distant from the station, 6.7^^<μs> at 385 miles and 4.5^^<μs> at 533 miles. 3. From the fifty data obtained by the measurements at places 250 miles or more apart from the nearest station, we got 4.2^^<μs> of probable error of the sky wave correction.

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デッカ航法利用による船舶の運動性能、ロラン位置の精度、海流の測定について(日本航海学会第22回講演会)

沓名景義, 重広敏

原稿種別: 本文
1960 年 22 巻 p. 77-84
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_77

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The position fixed by Decca has correspondingly the same degree of accuracy with that of the triangular survey using landmarks. From this point of view, the following studies in which Decca was utilized were carried out during the hydrographic surveying conducted August through September, 1959, off Tokati, Hokkaido, by the Japanese Hydrographic Office: 1) Measurement of the Survey Ship Takuyo's maneuverability (turning circle and distance of new course). 2) Observation of currents using ship's positions by Decca and dead reckoning, comparing the results with those obtained by G.E.K. 3) Measurement of the accuracy of positions by Loran. As to the result of 1), a considerable accuracy was ascertained in the ship's turning circle obtained. The result of 2) revealed that the values obtained by means of Decca and dead reckoning were approximately the same as those of G.E.K. As to the result of 3), ship's positions by Loran rate 2S1 were obtained within 1 mile error, but when using the rate 2S2, positions could not be obtained so accurately, in some cases with errors ranging from 5 to 7 miles, because of being in the proximity of the base line extension.

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ロランの地表波による測定時間差の変動について(I)(日本航海学会第22回講演会)

茂在寅男

原稿種別: 本文
1960 年 22 巻 p. 85-91
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_85

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デッカ航法の確率密度等価線図について(日本航海学会第22回講演会)

並川能正, 樽美幸雄

原稿種別: 本文
1960 年 22 巻 p. 93-100
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_93

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In accordance with our investigation on the contours of the constant probability density of the ship-position regarding several typical forms of the chain of the Decca Navigator System, it is found that the fundamental rules in selecting the most accurate pair are as follows: (A) You should utilize the pair except the nearest slave station, the pair on the opposite, when yon, close to the extension of the base line, enter the wedge-shaped part. (B) The borderline for selecting the most accurate pair near the base line is curved into the side which has a greater angle drawn by the two base lines, in case each neighbouring angle is different. (A)' According to the differences of the lane widths on the base line, the wedge-shaped part in the item (A) should be changed as follows: a) wider to each side, when the opposite pair is (P, R) b) narrower from each side, when the opposite pair is (R, G) c) biased towards the (R, G) side, when the opposite pair is (P, G) (B)' According to the differences of the lane widths on the base line, the borderline in the item (B) should be changed as follows, even when the angles drawn by each neighbouring base line are equal. a) much biased towards the (R, G) side, near the base line <MR>^^^ b) fairly biased towards the (P, G) side, near the base line <MP>^^^ c) slightly biased towards the (R, G) side, near the base line <MG>^^^

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レーダ映像と海図との比較について(日本航海学会第22回講演会)

前田文郎

原稿種別: 本文
1960 年 22 巻 p. 101-103
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_101

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レーダ・プロッティングによる他船の航過距離の誤差について(日本航海学会第22回講演会)

鮫島直人

原稿種別: 本文
1960 年 22 巻 p. 105-108
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_105

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The problem of errors in the Radar plotting was published by Capt. F.J. Wylie (J.I.N. 12, 198) and Capt. H. Topley (J.I.N. 11, 167), and it has been shown that the error in estimated distance of the C.P.A. depends on mean range and range change in plotting interval. The writer wants to introduce the rate of error to the estimated distance of C.P.A., like Topley showed the percentage error in the estimated speed. The formula (6) is the error rate of estimated distance and it gives fairly good result though it is very simple. It shows that a rate of error is inversely proportional to a bearing change, not being concerned with others. In fig.2 drawn from formula (6), the error rate is about 60% when the bearing change is 3°. If a bearing change is 1°, ΔD=1.72D It is ambiguous on which side the ship will pass, as the error is larger than the estimated distance of C.P.A. It can be said from above that it is necessary to have at least 3° bearing change between two observations, so that a maximum error rate is about 60% and probable error rate is about 20%. Further, it is desirable that an estimated distance of C.P.A. is 3 miles in fog, and then maximum error will be 1.8 miles and the remain distance 1.2 miles.

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水路測量に於ける円座標法に反転法を利用すること(日本航海学会第22回講演会)

藤崎正治

原稿種別: 本文
1960 年 22 巻 p. 109-112
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_109

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In Hydrographic survey there are three fixed points X, Y and Z on the earth. Projection of points X, Y and Z are points A, B and C on the paper. The ship's position is fixed by the intersection of two position lines found by observing the horizontal sextant angles subtended by two chords XY and XZ. In hydrographic survey sometimes points A, B and C are not on the surveyor paper (Cf. fig 1). Then there must be drawn two systems of many circles, one pass through two fixed points A and B. and the other pass through two fixed points A and C. To draw many circles as explained above is complicated. This subject is to transform circles into straight lines passing through the point D and E, such as AB・AD=AC・AE=a^2, (a is arbitrarily constant). Every straight line is determined by any two points on the line, so that it is shown for example as 50° and 50°, 60° and 60°, 70° and 70°, etc. In fig.1, it is shown to make surveyor paper by the indoor work. The surveyor paper is almost as big as the rectangular frame. In fig.2, the point A is the center of inversion. It transforms circles into straight lines. An inversion rule (a particular rule) has a scale, the scale point H, I such as EH・EI=a^2 are same numbered. In fig.3, it is shown how to make the rule. Fig.4 is the surveyor paper, used up to the present. Fig.5 is the new surveyor paper, devised by me. The dotted line is prepared to illustrate the directions for use. Fig.6 and 7 are tools for plotting the ship's position. Fig.8 shows a section for surveying.

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航海計器の配備条件について(日本航海学会第22回講演会)

千原義男

原稿種別: 本文
1960 年 22 巻 p. 113-121
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_113

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Basing upon investigation concerning working conditions of navigators on watch by the observation method and the actual arrangement and height of work-surface of navigational instruments at several ships, the author studied the rational arrangement and height of work-surface of equipment for navigational aid on the bridge in accordance with the request of human-engineering principles.

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低いReynolds数に於ける帆の断面形状及び周りの流線図について(日本航海学会第22回講演会)

稲葉恭人

原稿種別: 本文
1960 年 22 巻 p. 123-130
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_123

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For a study on the nature of a sail, the profile of the sail and the state of air current around it are fundamental data. The writer, in order to know them, performed tank experiments in low Reynolds number, and took photographs of stream lines as shown in Fig.4. To put the data in order, the writer used di, the small differences of profiles from the circles indicated in Fig.3, and got Table 1. Then, making use of these results he presented some considerations about the mutual relations between the profiles and the various alterable factors, viz., the angle of attack, Reynolds number and camber.

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津軽海峡に於ける波による船の動揺の実験について(日本航海学会第22回講演会)

川島利兵衛

原稿種別: 本文
1960 年 22 巻 p. 131-142
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_131

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This paper describs the analysis of the experiment about the ship's rolling motions induced by waves which was performed on September 5th, 1959 in Tsugaru Straits. The experiment consisted of the observations for wave heights and measurement of ship's rolling angles. For analysing the results of the experiment, statistical and spectral methods were used. As to the observations of waves, the photographs of Froud's wave pole were taken by a 8mm cine camera with a specially designed shutter, by which the successive records of every second were obtained for about 10 minutes long ; and as to ship's rolling motions, a pendurum type rolling angles recording meter was used. From the records which were obtained and measured by the above noted methods, the apparent periods and amplitudes of waves and rolling angles, the following items were calculated and discussed ; 1) The highest, 1/10 average, 1/3 average and average value of wave heights and rolling angles. 2) The energy spectra of wave heights and rolling angles.

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水槽実験によるアンカーの把駐特性 : アンカーの把駐力に関する実験研究その一(日本航海学会第22回講演会)

本田啓之輔, 片上圭四郎, 杉浦昭典

原稿種別: 本文
1960 年 22 巻 p. 143-155
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_143

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Authors had several Model tests to made researches on the holding characteristics of Stocked anchors (Mooring and Admiralty types) and Stockless anchors (Hall, Smith, and Bald types) with the aid of Automatic Null Balance Strain Recorder as the first step of the study on the anchoring of ships.

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霧中においては、一般航法(海上衝突予防法17条〜27条)の適用はない(日本航海学会第22回講演会)

坂平吾

原稿種別: 本文
1960 年 22 巻 p. 157-163
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_157

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We should not apply Steering and Sailing Rules (Article 17〜Article 27 in Prevention Collision) in any vessels in fog, heavy rain-storms & etc, for the vessels must be in sight of one another. A power-driven vessel must avert collision with another vessel only by the rule that is prescribed "navigate with caution until danger of collision is over" in Article 16 (b), not only when a vessel could not ascertain the possition of another vessel but also ascertained it by hearing her fog-signal.

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来島海峽南流時における現行航法上の問題点について(日本航海学会第22回講演会)

伊吹秀雄

原稿種別: 本文
1960 年 22 巻 p. 165-170
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_165

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When the direction of the tidal stream is southerly, the vessels should pass on the starboard side of each other (starboard to starboard passing) in to the water areas of Kurushima Kaikyo according to the "Cabinet Order For Navigation in Specified Water Areas (Article 7)". On the other hand, the vessels should pass on the Fortside of each other (port to port passing) in the water areas of the narrow swept channels led to the eastern entrance of Kurushima Kaikyo in accordance with the "Regulations For preventing Collisions At Sea, 1948 (Rule 25)". I consider, Therefore, we should become aware of the fact that these two contrary Sailing Rules are executed on the one border line of these two water areas at the eastern entrance of Kurushima Kaikyo. In this connection, I'll call your attention to prevent Marine Accidents that may happen due to the confusion on the execution of these Sailing Rules.

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商船の電力設備容量に対する考察(第2報)(日本航海学会第22回講演会)

細野正己, 武田幸男

原稿種別: 本文
1960 年 22 巻 p. 171-176
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_171

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Through the measurements of electric power consumption in M.S. "Sanuki-Maru" and M.S. "Honoruru-Maru" by recording meter and the investigations of electric power demand for about fifty cargo vessels in every state, we were ascertained that the conclusion of the 1st report are right. From the results, we discussed on the necessary capacity of generator and prime mover on the basis of loading power.

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奥付

原稿種別: 付録等
1960 年 22 巻 p. App1-
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_App1

ジャーナルフリー

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裏表紙

原稿種別: 表紙
1960 年 22 巻 p. Cover3-
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_Cover3

ジャーナルフリー

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CONTENTS

原稿種別: 表紙
1960 年 22 巻 p. Cover4-
発行日: 1960/03/25
公開日: 2017/09/26

DOIhttps://doi.org/10.9749/jina.22.0_Cover4

ジャーナルフリー

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