What must be done before entering a confined space?

Before entering a confined space, it is essential to conduct an atmosphere test and ensure proper ventilation. This precaution is vital for safety, as confined spaces can pose serious risks, including the presence of toxic gases, low oxygen levels, or potential explosive atmospheres. By performing an atmosphere test, personnel can assess the air quality and identify any hazardous conditions that might exist within the space.

Proper ventilation further mitigates these risks by ensuring that fresh air is introduced, helping to dilute any harmful substances and maintain a safe breathing environment. This procedure is part of the standard safety protocols outlined in the STCW and other safety guidelines because it protects workers from the latent dangers that may not be immediately visible.

Relying solely on personal judgment or other less formal methods significantly increases the likelihood of accidents or injury, as individual assessments may overlook critical atmospheric conditions. Similarly, entering immediately without tests ignores fundamental safety principles, leaving workers vulnerable to unseen hazards. Hence, taking the time to fully evaluate the confined space before entry is necessary for ensuring the safety and well-being of all personnel involved.