🔍 Key Concepts

• Understand what lightweight means for a vessel (weight of the vessel itself without fuel, cargo, consumables, etc.) • Recognize that DEEP DRILLER is a drilling unit, not a cargo ship, and think about the typical size/weight range of similar offshore units • Distinguish between realistic magnitudes (thousands of long tons) versus clearly unrealistic values for a single drilling unit

💭 Think About

• First, recall the definition of lightweight and how it compares to deadweight and displacement—which one is usually the largest number for big vessels? • Compare each option: does any value look wildly too large for a single offshore drilling unit compared to a large tanker or container ship? • Between the remaining more reasonable options, which seems most consistent with the size and structure of a modern offshore drilling unit like DEEP DRILLER?

✅ Before You Answer

• Verify that 680,914 long tons would imply a vessel far heavier than even the largest supertankers—does that make sense for a drilling unit? • Check that the lightweight of a unit like DEEP DRILLER should be in the thousands, not hundreds of thousands, of long tons • Before choosing, mentally compare with approximate lightweights of large ships (e.g., supertankers are on the order of tens of thousands of long tons, not hundreds of thousands)