A rapid external survey after an attack with a liquid agent is intended to determine contamination at vital topside stations. What area is assessed?

• A. Engine room
• B. Hull exterior
• C. Bilge spaces
• D. Topsides

Answer: (D)

When a liquid agent attack occurs, you’re scanning for contamination on surfaces the crew will touch and where contamination can easily affect vital equipment. The rapid external survey targets the topsides—the weather deck and upper exterior surfaces—because these areas are most likely to come into contact with the agent and are tied directly to access points for key stations and systems. Detecting contamination here helps determine where decontamination is most needed to protect critical operations and prevent the agent from entering interiors through vents, hatches, or equipment openings. Interior spaces like the engine room or bilge are not the immediate target of this external survey, and the hull exterior (depending on location) is not the focus for contamination affecting vital topside stations.