Optech's Cavity Monitoring System (CMS) revolutionizes the surveying of subterranean cavities. Custom designed for subterranean scanning, the CMS delivers a fast, accurate 3D surveying solution in a configuration that meets the challenges of working underground - a compact unit, wireless operation, sealed optics and specialized accessories. The CMS collects thousands of accurately located measurements per minute. These measurements can be used to determine stope volume, stope dilution, and sloughing/backfill volumes, and to create detailed drawings. Universally adopted data formats ensure that CMS data can be used in any software workflow. Optech's CMS developed in partnership with world-leading mining organizations, pioneered laser-based autoscanning for mining in the 1980's. With over 100 systems deployed globally, the CMS continues to provide fast, reliable and efficient scanning of underground cavities.