ADJUST ADJUSTING BOLTS TO MAKE THE FWD AND AFT OPTICAL TARGET CENTER COINCIDE WITH THE BEAM PROJECTED BY THEODOLITE. DELIVER TO SHIPOWNER AND SURVEYER AFTER FINISH.

• 调节艉管调整螺栓；使得艏艉光靶中心与经纬仪光点重合；则表明艉管中心线即为艉轴的轴中心线.；完工后需提船东船检认可