In regard to protective actions for explosive devices, the area where the blast originates or suspicious package is located is referred to as the hot perimeter/isolation zone.
The term "Hot Zone" refers to a region where there is a significant potential for contamination and exposure to dangerous chemicals.
Only emergency responders who are wearing the greatest degree of PPE necessary for the circumstance may enter this area. The characteristics of the HNS implicated, the extent of the leak, and any associated dangers or concerns (such as is the material toxic?
Is it flammable? Is there a risk of explosion? The degree of PPE required? ), weather patterns, where you are on the ship, and your options for isolation, such locking fire doors, etc.
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