🔍 Key Concepts

• Enclosed space / cargo hold ventilation requirements before personnel enter or vehicles operate • Mechanical sequence of stern door vs. stern ramp (which one must be opened first to allow access?) • Fire/explosion risk from fuel vapors and exhaust gases in Ro-Ro cargo spaces

💭 Think About

• In what order should you control hazards: make the atmosphere safe, then create an opening, then provide physical access—or is another order safer and more realistic? • If the stern door is still closed, can you practically lower and use the ramp? If the ramp is down but ventilation is not yet on, what risks are you creating for people and vehicles entering the cargo space? • Which step is mainly about safety of atmosphere, and which steps are about physical access, and how should those logically be prioritized?

✅ Before You Answer

• Identify which choice has ventilation started before significant entry or vehicle movement in the cargo hold • Check which options show a physically possible sequence: can the ramp be lowered before the stern door is opened? • Eliminate any sequence that would allow people/vehicles to enter the cargo space before the atmosphere is made safe with ventilation