🔍 Key Concepts

• Relationship between tank pressure and discharge rate in cargo operations • Role of vapor return from terminal during cargo discharge • Why too low tank pressure can be dangerous for tank structure and equipment

💭 Think About

• If tank pressure is dropping, what does that tell you about how fast liquid is leaving compared to vapor coming in? • Which options would directly reduce how fast pressure is falling, and which would increase pressure by changing vapor flow? • In real operations, would a Cargo Officer normally choose just one action, or might they combine measures to protect the tanks?

✅ Before You Answer

• Verify which actions would increase or stabilize pressure in the cargo tanks. • Identify any option that would clearly not help if the terminal cannot provide additional vapor. • Consider standard safety procedures when tank pressure approaches the lower design limit—do you immediately stop, reduce rate, or adjust vapor balance first?