Dear Surveyors,I am working in a infrastructure Marine project. So I need to do some setting out work under the water. (Concrete Blocks size of =8Mx1.2Mx0.8M) It's around 9 meter depth from sea level. (Sea bed level = - 9.000)*Total station -Leica Builder 503Can any one Help/ suggest me for ,How we can setup the Targets, inside water around 9 meter depth, with maximum accuracy.?Give me a solution.