"Seeing traffic above & below each other does present a new idea of mass vehicle movement on bridges and super-highways, but you must be careful that you don't create new bottlenecks from this design. Ex. On each ends of your bridge presents…"
"I agree with Grabwell Fundira above. A large prism offset is normally -30mm. It is generally to your advantage to use the same type of equipment when retracing an as built survey. MINI PRISMS ALL HAVE DIFFERENT OFFSETS THAN A LARGER PRISM. YOU MUST…"
"I agree with Hunter above. I just Googled the leica ts11 & viewed the instrument. On the same side as the battery, there is a singular "dot" above the battery, on the same level as the middle eyepiece. ENJOY."