水字展开的方法

The Methods of Draft Mark Expansion

船舶水字的高度要求为投影高,而很多水字是贴在船体曲面上的,所以必须展开。水字展开的方法不一而足,但原理一样,而用程序可很好地完成水字展开。文章对船舶各处水字的展开原理、方法、技巧进行了总结。

The height of ship's draft mark is a vertical height, but the draft mark is installed on curved surface of ship hull, so the draft mark must be have an expansion. There are some methods for expansion, but the principium of methods is the same, and the expansion will be good by special software. This paper sums up the principium, method and technique of expansion the draft mark on diverse positions on ship hull.