水上打桩,长期以来采用普通经纬仪在陆上指挥打桩船定位的方法。工人同志说:“它好象竹桿儿引瞎子,牵着跑。”船上的人心中无数,完全处于被动局面。这样造成定位时间长,精度低。特别是外海工程,在引桥长、视距远、地形复杂而有时又要在夜间施工的情况 Piling on water, long-term use of ordinary theodolite in the land command piling boat positioning method. The workers’ comrades said: “It seems as if a bamboo pole leads a blind man and leads a run.” "The hearts of innumerable people are totally passive. This resulted in long positioning time, low accuracy. In particular, the case of offshore engineering, where the approach bridge is long, the horizon is long, the terrain is complicated and sometimes it is required to be constructed at night