🔍 Key Concepts

• Standard industry units used for measuring crude oil and petroleum products • Difference between storage/transport units and smaller retail units • Common units used in tanker cargo documentation and load/discharge calculations

💭 Think About

• When oil companies quote production (e.g., daily output) or tanker capacity, which unit do you usually hear? • Which unit is historically tied to early oil trade and wooden casks, and is still used in contracts and cargo documents? • Which of these units would be most practical for measuring tens of thousands or millions of units of liquid cargo on a tanker?

✅ Before You Answer

• Eliminate units that are mainly retail or consumer-level quantities • Think about what unit you see in market prices for crude oil in financial news • Ask yourself which unit is standard in tanker cargo quantity reports, bills of lading, and charter parties