Freeboard

Japanese: freeboard
Freeboard

…Furthermore, the load line must be marked in the center of the hull, and ships must not carry cargo beyond this load line (see diagram). The height from the water surface to the deck of a ship is called the freeboard, but as the draft deepens, the freeboard becomes smaller, which can be dangerous when the sea is rough, so the method of determining the load line is stipulated by the International Load Line Convention. In accordance with this, in Japan, the Ship Safety Act requires that the Ministry of Transport or a classification society (Nippon Kaiji Kyokai) inspect ships and determine the load line. …

*Some of the terminology that mentions "freeboard" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…さらに,船体の中央部には満載喫水線を標示するよう定められており,船はこの満載喫水線をこえて積荷を積載してはならない(図参照)。水面から船の甲板までの高さを乾玄(フリーボードfreeboard)というが,喫水が深くなれば乾玄は小さくなり,海が荒れた場合には危険になるため,〈国際満載喫水線条約〉によって満載喫水線の定め方が規定されている。これに従って日本では〈船舶安全法〉により,運輸省または船級協会(日本海事協会)が船の検査を行い満載喫水線を定めることになっている。…

※「freeboard」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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