Marine shafting is one of the main parts of ship power installation and alignment calculation is necessary for the safety and reliability of ship.

船舶推进轴系是船舶动力装置的重要组成部分，校中计算是保证船舶推进轴系的安全、可靠工作不可缺少的环节。

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Under a traditional installation method a shafting is first mounted on a shipway and after a launching, the shafting undergoes an alignment through the adjustment of a main machine location.

传统的轴系安装方法是先在船台安装轴系，后下水通过调整主机位置进行轴系对中安装。

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