displacement to the volume of a rectangular
方块、立方体
体积、容积
C
block whose sides are equal to the breadth extreme,
the mean draught and the length between
平均的
垂线间长
The length overall(LOA) —the max. horizontal distance from bow to stern.
船首
船尾
（船舶）总长----从船首至船尾的水平最大距 离。
➢ e.g.（P16-3-2）
➢ length BP(LBP) 垂线间长（LPP）
➢ perpendicular 垂线
e.g.（P16-3-4） ➢ length WL(LWL ) 水线长
The length WL(LWL )—the length of design waterline or the length of full-load waterline. 水线长----设计水线或者满载水线的长度。
➢ e.g.（P16-3-5） ➢ breadth moulded(B) 型宽
垂向菱形系数CVP是排水体积与一个棱柱体体 积之比，该棱柱体的长等于吃水，横剖面积 等于水线面面积。
e.g.(P17-6-1) ➢ Coefficients of ship form 船型系数
Coefficients of ship form will help you have a better understanding of the hull shape under water and the hull variation along ship length, and directly affect seakeeping performances of vessels.
The breadth moulded(B)—the max. breadth at design waterline.
设计水线的最大宽度。
e.g.（P16-3-6） ➢ depth moulded(D.H) 型深
The depth moulded(D.H) —the vertical height from the upper surface of keel to the
ratio of the area of the waterplane
A
B
to the area of its circumscribing rectangle.
C
环绕、包围；[数]
矩形
外接、外切
水线面系数CWP是水线面面积与其外接矩形面积的比
值。
e.g.（P16-5-2） ➢ parallel middle body 平行中体
龙骨
surface of upper deck within the midship transversal cross section. 型深----船中横剖面处从龙骨的上表面到上甲 板表面的垂直高度。
e.g.（P16-3-8） ➢ draft (draught) (T) 吃水
Draft (draught) (T)—the vertical height from the upper surface of keel to design waterline. 吃水----从龙骨上表面到设计水线的垂直高度。
横剖面面积
棱柱体
length equal to the length between perpendiculars and a cross-sectional area equal to the midship sectional area.
纵向菱形系数（或简称为菱形系数）CP是排水体积与 一个棱柱体的体积之比，该棱柱体的长等于垂线间 长，横剖面积等于船中处横剖面面积。
e.g.(P16-1-2)
➢ dimension 尺度、尺寸 内容
Normally speaking, contents under Ship General will,
in spite of some slight differences among
individual specifications, include general
e.g.（P16-3-9） ➢ freeboard(F) 干舷 Freeboard(F)—equal to the depth moulded
minus draft.
减掉、减去
干舷----等于型深减去吃水。
➢ e.g.（P16-4-1）
➢ coefficient 系数
几何形状
证明
In the definition of hull geometry there are
perpendiculars.
方形系数CB 是排水体积与其（外接）长方体的体积之 比，该长方体边长分别等于最大船宽，平均吃水和
垂线间长。
e.g.(P17-4-1)
➢ longitudinal prismatic coefficient 纵向菱形系数
The longitudinal prismatic coefficient, CP or simply prismatic coefficient is the ratio of the volume of displacement to the volume of a prism having a
certain coefficients which will later prove of
value as guides to the fatness or slimness of
the hull. 向导、准则
肥
瘦
在船体几何形状的定义中，用一些特定的系 数来作为衡量船体肥瘦的准则，这一点后来 被证明很有价值。
➢ e.g.（P16-2-4 ） ➢ design water plane 设计水线面
The design water plane—a horizontal plane through design waterline.
设计水线
设计水线面----一个通过设计水线的水平面
➢ e.g.（P16-3-1） ➢ length overall(LOA) 总长
细微差别，但都包括总体概述、材料、尺度、吨位、
稳性、船级、图纸、监造、试验和试航、交货等方 面的内容。
e. g.（P16-1-6） ➢ sea-keeping performance 航海性能 ➢ principal dimension 主尺度
Different sea-keeping performances of vessels have much to do with principal dimensions and ship forms. 船型 船舶航海性能的不同与主尺度、船型密切相 关。
描述
船级
吨位
description, materials, dimensions and tonnage, stability, classification, drawings, supervision, test
试航
交船
监造
and trials, delivery, etc.
通常来讲，尽管船舶总体内容会在个别的法规上有
draught and the breadth extreme amidships.
船宽
船中
中横剖面系数 CM 是中横剖面面积与其（外ቤተ መጻሕፍቲ ባይዱ
接）矩形面积的比值，该矩形的边分别等于
吃水和船中处最大船宽。
➢ e.g.(P17-2-1)
➢ block coefficient 方A 形系数
B
The block coefficient, CB is the ratio of the volume of
➢ vertical 垂直的
e.g.
交叉、相交
three cross sections of hull vertical to one another
三个相互垂直且相交的船体剖面
相关记忆：longitudinal，transverse， horizontal，vertical，normal，
perpendicular, parallel
Lesson 2 Principal Dimensions
Contents: 1. Vocabulary and Sentence
2. Vocabulary summary 3. Exercise
一、Vocabulary and Sentence
➢ e.g.(P16-1-1)
➢ technical specification 技术规格书
If you turn up a technical specification which is regarded as the code of shipbuilding, you
法典、法规
主章节 目录、索引
will always find that Main Group 1 in the index is ship General. 船舶总体 如果翻阅作为造船法规的一本技术规格书，你会发 现目录中的主章节1中通常是船舶总体的内容。
The length BP(LBP)—the horizontal distance
between the two perpendiculars, i.e. stem
and stern.
船
垂线间长----首尾垂线间的水平距离。 首
注：LBP： length between perpendiculars
➢ 句式：A is the ratio of B to C A=B/C A 是B与C的比值