The installation error in a highly precise USBL can not to be ignored before its actual application. 高精度超短基线定位系统的安装误差影响不可忽视，需要在使用前进行精确校准。
Because of the special bucket foundation constructure, it is difficult to measure the bucket foundation installation error by using transit. 根据桶形基础的特殊形式，采用普通经纬仪对桶基安装误差进行测量是比较困难的。
