🔍 Key Concepts

• Reserve buoyancy vs. buoyancy currently in use to keep the ship afloat • Difference between freeboard (distance) and volume of enclosed watertight spaces • Effect of intact watertight spaces above the waterline on survivability after damage

💭 Think About

• Ask yourself: Which option refers specifically to a volume of enclosed space rather than just a distance or a stability condition? • Which term is most closely related to how much extra buoyant capacity the ship has available if it gets loaded more or flooded? • Which options describe effects on stability (like liquids moving or ship nearly unstable) rather than a defined volume of structure above the waterline?

✅ Before You Answer

• Identify which choices are about distance (measured in feet/meters) versus about volume (measured in cubic units). • Eliminate any terms that mainly deal with liquid movement inside tanks or small changes in stability rather than overall remaining buoyant volume. • Confirm which term is used in stability texts to describe a ship's additional buoyant capacity above the current waterline that helps it survive damage or added weight.