Definition - What does Guidance System mean?
A guidance system is a system that locates the actual position of the microtunnel boring machine (MTBM) relative to the laser or other device. The laser or other device should be referenced to the design line and grade. A guidance system is used to control the direction of a directional boring operation. Different types of guidance stems are available to ensure that there is control over activity and to minimize unintended consequences.
Trenchlesspedia explains Guidance System
Used in conjunction with an MTBM, the guidance system uses lasers to determine the direction of the drill. A laser mounted in the entry pit sends a signal to a corresponding unit behind the cutting head. Information is transmitted via cables to the control room where an operator adjusts the drill direction. Steering jacks are used to adjust the cutting head in response to the laser feedback to the operator. Some MTBMs have cameras installed, which provide additional information for steering and control.