A small fire is reported in the forward cargo hold on a vessel equipped with a combination smoke detection/carbon dioxide fixed fire extinguishing system. After ensuring the space is unoccupied and properly sealed off, you should NEXT __________.
• Fixed CO₂ (carbon dioxide) fire extinguishing systems operation sequence • Difference between detection/monitoring and discharge/control functions • Importance of correctly isolating or selecting the affected space before releasing CO₂
• First, think about what has already been done (space checked and sealed). What general step in a CO₂ system sequence usually comes immediately after this? • Which answer choices are about selecting the correct space/line versus actually releasing the CO₂? What logically must come first? • Look at which options could create a dangerous or unintended discharge to the wrong space. Which option best prevents that while still moving the process forward?
• Identify which choice deals with selecting the proper CO₂ line/valve for the affected space (not just detection). • Confirm which actions would only affect detection/monitoring and would NOT yet prepare the system to release CO₂ into the correct space. • Eliminate any option that would immediately discharge CO₂ without clearly having selected the correct space/line first.
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