Confined spaces are among the most hazardous work environments across industries such as construction, manufacturing, oil and gas, utilities, chemical processing, and power generation. Areas including tanks, silos, storage vessels, pipelines, sewers, pits, tunnels, and manholes may appear safe but can contain life-threatening hazards such as oxygen deficiency, toxic gases, flammable atmospheres, and restricted entry or exit points. Without proper knowledge and preparation, employees face a significantly higher risk of serious injuries or fatalities.