Steel ship

Japanese: 鋼船 - こうせん（英語表記）steel ship

A ship made of steel. With the advancement of shipbuilding technology, ships have evolved from wooden ships to ships made of wood and iron, to iron ships, and then to steel ships due to the invention and improvement of steelmaking methods. However, today's large ships are generally made of steel, and are propelled by turbine engines or diesel engines. In 1868, the British Lloyd's Register of Shipping announced rules for building steel ships, recognizing that steel, which has superior material strength to iron, can be about 20% thinner than iron. In 1873, France built the first steel warship, the Louttable. In 1879, the first steel ocean-going steamship, the Rotomaha, was launched in the UK, and in 1890, the steel ship Chikugogawa Maru was launched at the Nagasaki Shipyard. Currently, most ships, except for small ones, are made of steel. Since then, research by the shipbuilding industry and shipowners has progressed, and the cargo carrying capacity of steel ships has increased dramatically compared to wooden and iron ships.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

鋼材で造った船。船は造船技術の進歩に伴って木造船から木鉄交造船，鉄船，さらに製鋼法の発明と改善によって鋼船へと推移してきたが，現在の大型船は鋼船が一般的で，タービン機関やディーゼル機関を推進力としている。 1868年イギリスのロイド船級協会 (→ロイズ船級 ) は鋼船を建造するための規則を発表，鉄より材料強度がすぐれている鋼を，鉄より2割方少い厚みでよいと認めた。 73年フランスが初めて鋼製軍艦『ルドータブル』号を建造。 79年イギリスで最初の鋼航洋汽船『ロトマハ』号が，また日本でも，90年長崎造船所で鋼船『筑後川丸』が進水した。現在は小型船以外は，ほとんど鋼船となっている。その後，造船業と船主による研究が進み，鋼船の貨物積載能力が木船，鉄船と比べて飛躍的に伸びた。

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