🔍 Key Concepts

• GMT (metacentric height) and its relationship to stability and inclination • How trim affects the behavior of a MODU (Mobile Offshore Drilling Unit) when stability changes • Difference between angle of loll and normal small-angle inclinations

💭 Think About

• Think about what happens to the righting moment when GMT gets larger: does the vessel tend to lean more, less, or stay the same? • If a MODU already has some trim, would increasing GMT make it more eager to return upright or more eager to move away from upright? • Consider whether an angle of loll is associated with low or high metacentric height.

✅ Before You Answer

• Recall that larger GMT generally means stronger righting moments at small angles of heel. • Review what an angle of loll is: does it occur when stability is good (large GMT) or when GMT is very small/near zero? • Decide whether an increase in stability would make the existing inclination grow, shrink, or stay unchanged.