Re - run of fine levelling procedure Position a Bubble follows LEFT THUMB

Position a

Position b 90 0 to position a Bubble still follows LEFT THUMB

Position b 90 0 to position a Bubble still follows LEFT THUMB

Position b 90 0 to position a

Position a Repeat position a)

Position a Repeat position a)

Position c Bubble drift is 3 divisions Remove half the drift i.e. 1.5 divisions

Position c Bubble drift is 3 divisions Remove half the drift i.e. 1.5 divisions (using two footscrews)

Position d Bubble drift is 3 divisions Remove half the drift i.e. 1.5 divisions

Position d Bubble drift is 3 divisions Remove half the drift i.e. 1.5 divisions (using one footscrew) The bubble is now “FROZEN” in 1.5 divisions to the left and should stay this much out wherever it is rotated to.

SCREWS and Optical Plummet LEGS and Pond Bubble SCREWS and Plate Bubble HEAD and Optical Plummet SCREWSLEGSSCREWSHEADSCREWSLEGSSCREWSHEADSCREWSLEGSSCREWSHEADSCREWSLEGSSCREWSHEADSCREWSLEGSSCREWSHEADSCREWSLEGSSCREWSHEAD

Locking Wing Nut Arrow pointing up - Theodolite is released

Target

Vertical Circle - (for vertical angles) Face Left F/L

Transit Telescope Rotate Theodolite

Face Right (F/R)