Which statement about the free surface...

Which statement about the free surface...

Question 1 of 2921866636eec28f7522a1c51cdb3

Which statement about the free surface correction is TRUE?

Question 1 of 29218

Q

Which statement about the free surface correction is TRUE?

🔍 Key Concepts

• Free surface effect (FSE) and how it affects GM (metacentric height) and vessel stability • Relationship between tank location (centerline vs off-centerline) and free surface correction • How draft / displacement changes the size of the free surface correction

💭 Think About

• Think about whether free surface correction is something that makes the ship more stable or less stable when you have slack tanks. How does that relate to whether you add it to GM or subtract it? • Consider what happens to the free surface moment in a tank that is on the centerline versus one that is off the centerline. Which situation produces a larger heeling effect from the same amount of liquid movement? • Ask yourself: as a ship gets deeper in the water (greater displacement), does the same tank’s free surface have a relatively bigger or smaller effect on the ship’s overall stability?

✅ Before You Answer

• Remember that free surface correction always works in one direction with respect to GM (it never switches from being added to being subtracted depending on draft). • Verify whether moving the tank off the centerline increases or decreases the free surface moment for the same tank dimensions and slack condition. • Check how increasing displacement (deeper draft) changes the numerical value of the free surface correction for a given tank’s dimensions and free surface moment.