一、问题的提出设计船长是确定码头泊位长度的依据,过去在设计中是以某一艘船舶的长度为标准,作为该吨级泊位的设计船长.但由于船舶尺发变化较大,实际上很难找到这祥一艘具有代表性的船舶.为了解决这一问题,我们采用了累积频率的方法,统计并绘制国内外该吨级船舶的船长保证率曲线,选取一定的保证率船长作为该吨级泊位的设计船长.这种方法我们认为比较合理,但存在保证率的取值标准问题. I. PROBLEM PROTOCOL DESIGN The master is the basis for determining the length of a berth. In the past, the length of a certain ship was used as the design standard for the design of the berth, but due to the large changes in the size of the ship, in fact In order to solve this problem, we adopt the method of cumulative frequency to calculate and draw the captain’s guarantee rate curve of the tonnage of ships both at home and abroad, and select a certain guarantee rate as the master Tonnage berth design captain of this method we think is more reasonable, but there is a guarantee standard value of the problem.