Modern tunnel guidance systemPPS guidance systems are designed specifically for TBMs and roadheaders, giving the operator all of the necessary information to keep his machine on course and to return it to the design centreline when necessary. All hardware and software has been chosen to cope with the harshest tunnelling environment, and developed with experience over the years. Graphical presentation is operator friendly, with clearly arranged display, and systems can be tailored to specific requirements.PPS, located in Germany, can supply guidance systems to any part of the world. For more information, visit www.pps-muc.de or e-mail info@pps-muc.de or click here or on the PPS logolink. 25/09.