tacs celebrates its 10th birthdaytacs GmbH, the German specialist in TBM guidance, is this year celebrating its 10th birthday.Ever since its first project, a metro tunnel in Munich in 1993, tacs has grown progressively. Its laser based system, the core of which is a self-developed video target, has now been used successfully in more than 30 tunnel projects. Clients and operators find the attractive tacs graphical displays and documentation are both easy on the eye and easy to use. tacs instruments are renowned for calculation of a correction curve to return tangentially to the DTA and fully automatic check measurements. Calculation of the optimum position of the tapered ring is also a major feature.The overall tacs philosophy is to act as an interface between the disciplines of surveying, civil engineering and machine technology. A profile of the tacs company can be viewed by clicking on their logolink in the panel alongside. For a more detailed engineering discussion, contact Uli Ramminger at tacs GmbH, tel +49 89-578396-16, e-mail info@tacsgmbh.de, or visit www.tacsgmbh.de Latest version of acs guidance system software (click on image to enlarge)