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在过去的千年中,世界舰船技术有许多重要的进展和发明: 第11世纪在整个地中海国家开始了在建造船体时使用肋骨。第12世纪在第13世纪以前,虽然许多国家已经出现了某种类型的罗经,但是,今天被承认为磁罗经的鼻祖却出自13世纪。1269年,法国政府明
In the past millennium, there have been many important advances and inventions in world ship technology: In the 11th century, ribs were used throughout the Mediterranean countries to build hulls. In the 12th century, before the 13th century, although many types of compasses had already appeared in many countries, the earliest ancestors of magnetic compasses were recognized today from the 13th century. In 1269, the French government stated