🔍 Key Concepts

• Free surface effect in tanks • How liquid movement affects stability • Structural features inside tanks that slow liquid motion

💭 Think About

• When a tank is partially filled, what does the liquid try to do as the ship rolls or pitches? • What kind of internal structure would help slow down or break up that liquid movement? • Which option describes an effect on the liquid inside the tank itself, not on cargo separation or damage control?

✅ Before You Answer

• Focus on which choice deals with movement of liquid in a partially filled tank • Eliminate choices that are about cargo segregation rather than liquid motion • Ask: which function most directly reduces sloshing/surging of liquid from side to side?