This week we completed the survey engineering activity for the tracking of the VRS position of the FDS vacuum components on the floor, in the Central Building, the North Gallery and the initial part of the North Tunnel (tube supports for the link between the SQB1-SQB2 minitowers and the link between SQB2 and the FC-IM microtower). Fig.1 to 10 show the final result of the survey engineering activity. We also traced the position of the SQB2 center and the reference cross for the next installation and alignment (Fig.5 and 6).

Tab.1 reports the final result in VRS, with the nominal and the surveyed coordinates.