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- 藤崎 正治
- 海上保安大学校
書誌事項
- タイトル別名
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- Course-Recording Apparatus of the Coasting
- 沿岸航行の際の航跡記録装置
- エンガン コウコウ ノ サイ ノ コウセキ キロク ソウチ
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To decide the ship's position on the chart, the following method sometimes has been used ; select three objects whose positions are accurately given on the chart. With sextants, measure simultaneously the horizontal angles between the center object and the right and left objects, then set angles to the 3-arm protractor. Then place the protractor on the chart with its center at about the estimated position of the ship with the straight edge of the fixed arm passing through the plotted position of the center object. Move the protractor about until the straight edges of the right and left arms pass through the plotted positions of the right and left objects. The center of the protractor is now accurately at the position of the ship at the time the sextant angles were taken. But this method being pretty complicated, it is scarecely used except for the hydrographic survey. The instrument I have invented is operated as follows. Setting the instrument, with two sextants, to measure simultaneously the horizontal angles between the center object and the right and left objects, the index arm of one sextant is moved until the right obiect coincides with the center one below and the other moved until the left object coincides with the center one below. Next switch on an electricity without watching the graduation, and by synchro-motor, twice as large as these angles on two sextants are reproduced to this instrument, which has been made to record the position of the ship. Repeating this means the course will be recorded. The principle of this instrument and the direction for use are illustrated by Fig.1. Its construction is illustrated from Fig.2 to Fig.6.
収録刊行物
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- 日本航海学会誌
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日本航海学会誌 27 (0), 43-47, 1962
公益社団法人 日本航海学会
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詳細情報 詳細情報について
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- CRID
- 1390282681072479104
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- NII論文ID
- 110006446560
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- NII書誌ID
- AN00188863
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- ISSN
- 24330116
- 04666607
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- NDL書誌ID
- 9157654
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可