If the cause of severe list is off-center...

Question 1 of 31048fy_heal_CREATE_q165_2027

If the cause of severe list is off-center ballast, what will counterflooding into empty tanks accomplish?

Question 1 of 31048

If the cause of severe list is off-center ballast, what will counterflooding into empty tanks accomplish?

🔍 Key Concepts

• List vs. trim – understand what a list is and how it relates to transverse stability • Ballast and free surface effect – how shifting water in tanks affects stability and heel • Righting arm (GZ) and righting moment (W × GZ) – how changes in weight distribution change these

💭 Think About

• When you counterflood into empty tanks on the opposite side of the list, what happens to the ship’s center of gravity (G)? Think about its movement sideways and vertically. • How does adding water ballast on the low side vs. the high side affect the angle of list and the size of the righting lever (GZ)? • Is counterflooding mainly used to change the heel angle, the shape/height of the GZ curve, or both? Which of the choices best matches the primary immediate effect?

✅ Before You Answer

• Verify how moving or adding ballast transversely changes the ship’s heel (list) angle. • Think about whether counterflooding is intended as a stability-improvement measure or an emergency measure to reduce excessive heel. • Consider which answer choice describes the direct observable result first (what you see the ship do) rather than a more abstract calculation result.