🔍 Key Concepts

• Fixed fire extinguishing systems on MODUs (Mobile Offshore Drilling Units) and how they are controlled • How crew members quickly identify which spaces will be flooded with extinguishing agent before operating a valve • Regulatory focus on clear labeling for safety and avoidance of accidental discharge

💭 Think About

• If a crewmember is about to open a branch line valve during a fire, what is the most critical information they must know to avoid discharging agent into the wrong area? • Which of the options would be standardized and unlikely to change often, making it ideal for permanent marking on a valve? • Think about what information would already be found on system plans, gauges, or maintenance logs, and what must be physically marked right on the valve itself.

✅ Before You Answer

• Verify what information about pressure is normally found on gauges or system nameplates rather than on individual branch valves. • Consider which option directly tells you where the extinguishing agent will go when that valve is opened. • Ask: Which marking would help prevent accidental discharge into an occupied or wrong space, a major safety concern on a MODU?