What is a precaution during a DG spillage drill if fumes are present?

Donning protective breathing equipment is the appropriate precaution during a dangerous goods (DG) spillage drill when fumes are present because this equipment is specifically designed to filter out harmful substances and provide a safe breathing environment. In scenarios where hazardous materials are involved, the risk of inhaling toxic fumes is significantly increased. Protective breathing equipment ensures that crew members can continue to function effectively and safely while addressing the spillage, thereby minimizing health risks.

Using oxygen masks is generally more appropriate for situations where there is a lack of breathable air, such as in high-altitude emergencies, rather than in the context of toxic fumes. Closing cabin doors may help to contain the area of the spill, but it does not address the immediate risk of fume inhalation. Covering the area with a blanket might help to minimize vapors but is not sufficient as a protective measure for crew members working in the vicinity. Thus, protective breathing equipment stands out as the most effective and necessary action to maintain crew safety during a spillage involving dangerous goods.