🔍 Key Concepts

• stability and inclination of floating offshore units • difference between sudden/rapid vs slow/gradual changes in list or trim • how weight change inside the vessel vs external events affect stability

💭 Think About

• Look at which options would most likely produce a sudden, rapid increase in inclination rather than a slow, predictable one. • Ask yourself which causes are usually anticipated and calculated in advance during stability planning, and which tend to be unexpected emergencies. • Consider how each choice would physically act on the COASTAL DRILLER: does it change weight distribution slowly over time, or can it create a quick and dangerous shift in heel?

✅ Before You Answer

• Focus on the word "unexpected rapid"—eliminate any options that normally cause gradual changes in stability. • Think about which cause would be treated as a design/operational calculation issue versus a casualty or sudden event. • Verify which option is most commonly associated with an emergency list/heel incident on floating units in stability training.