🔍 Key Concepts

• Liftboat stability and list control when transitioning from jacked-up to afloat condition • Effect of leg movement on trim and list as the hull becomes buoyant • Safe operation of cranes and topside equipment during jacking operations

💭 Think About

• As the hull comes free of the bottom, what happens to stability and how can sudden list be created? • How does moving more than one leg at a time affect the loads on the hull and legs compared to moving them individually? • What is the safest condition for heavy equipment (like cranes) when the vessel is in a potentially unstable transition phase?

✅ Before You Answer

• Verify which action minimizes sudden changes in list or trim as buoyancy takes over from leg support • Check which choice best reflects standard liftboat operating procedures and manufacturer/field guidance • Confirm which option keeps structural loads and stability changes gradual and controllable during jacking down