This course was recorded in 2021 by Prof. Wulf Schubert, an ISRM Fellow and Vice President at Large for the ISRM from 1999 to 2003. The course has six parts, each opening in its own page. Part 1 - Geotechnical Monitoring for Tunnels Part 2 - Prediction on Displacements and Check of System Behavior with GeoFit Part 3 - Use and Importance of Deflection or State Lines Part 4 - Displacement Vectors in Cross and Longitudinal Section Part 5 - Evaluation of Displacement Vector Orientations and Ratios of Displacement Components Part 6 - Evaluation and Prediction of Lining Utilization from Displacement Measurements