This e-learning course introduces the principles of gas measurement and confined space safety in industrial and offshore environments. Participants will learn about oxygen deficiency, flammable atmospheres, toxic gases, and the use of gas monitoring equipment. The course also covers confined space hazards, entry permit systems, pre-job safety planning, and emergency response requirements. Learners will gain awareness of calibration, atmospheric testing, and the responsibilities associated with safe confined space operations. The course supports personnel who require an understanding of gas detection equipment and safe entry procedures before working in hazardous environments