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- 嶋田 和治
- 海上保安大学校
書誌事項
- タイトル別名
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- Errors of Dead Reckoning's Formula resulted from Difference of Assumption
- 推測航法における計算式の仮定より生ずる誤差について
- スイソク コウホウ ニ オケル ケイサンシキ ノ カテイ ヨリ ショウズル ゴサ ニ ツイテ
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抄録
Some formulas for converting distance on a rhumb line track into distance of latitude and longitude are approximate equations, and their errors are negligible in practical use. But in special cases, their assumptions may lead to unthinkable results. For example, in low latitude departure in Marcator's Sailing becomes greater than difference of longitude, and true middle latitude on terrestrial ellipsoid is not between two latitudes passing on two points. To research these subjects, it is necessary to take the correct equation of meridian length and departure in navigational formulas. The objects of this paper are to point out the errors of each formula in navigational Dead Reckoning computation and to discover the real relation between True Mid Lat Sailing, and also point out the errors of Marcator's Sailing in which the geographical miles are used and Parallel Sailing assumed by spherical earth.
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 28 (0), 79-88, 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
- 1390282681073001088
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- NII論文ID
- 110006446576
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- NII書誌ID
- AN00188863
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- ISSN
- 24330116
- 04666607
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- NDL書誌ID
- 9157670
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可