推測位置指示器について(日本航海学会第25回講演会)

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書誌事項

タイトル別名
  • On The Trackrecorder with Dead Reckoning Position Indicator
  • 推測位置指示器について
  • スイソク イチ シジキ ニ ツイテ

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抄録

Hokusin-Mechanical-Trackrecorder has especially been used by whale catcher boats in Japan. The instrument contains no vacuum tubes or other electronic components. Most of components are made of simple mechanical parts such as gears, coupling and motors. But the instrument only traces the track of ship's movement by mechanical Sine-Cosine roller-disc system, By using of this system, we could trace the ship's movement, at the same time, indicate the ship's Dead Reckoning Position by Latitude-Longitude counter, which is consists of four gears. The counter was used for reading the degrees and minutes. The equation of longitude at the precent latitude is d.Sin Co./Cos Lat. We made the data of cos Lat. which is continiously introduced from Lat. gears, insert into the mechanics of Long. gears. This instrument was installed in the new fishing training ship "Kagoshima Maru" built in 1960. We obtained a good operative record in maiden vayage.

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