🔍 Key Concepts

• Definition of lightweight for mobile offshore drilling units (MODUs) like DEEP DRILLER • What items are included in deck load versus what is considered external loads • Difference between built‑in liquids (in structure tanks) and variable loads added later

💭 Think About

• Think about what the vessel or unit physically consists of at the shipyard before any cargo, consumables, or operational equipment are added. What is normally included in that basic condition? • Which of the listed items are considered permanent parts of the unit, and which are operational or variable items that can change from job to job? • For each answer choice, ask: Would this item be present in the as‑built condition used to establish the official lightweight in stability documents, or is it something added for a particular operation?

✅ Before You Answer

• Be clear on whether lightweight includes or excludes variable loads such as drilling equipment, cargo, and consumables • Verify whether lower‑hull liquids in permanent tanks (like ballast or machinery liquids) are counted in lightweight or in the operating/loading condition • Check if external loads and deploying anchors are considered part of the unit’s permanent structure or part of a specific operational configuration