What does Pink indicate on the Flooding Effect Diagram?

• A. Stability decreases despite Free Surface
• B. Stability increases despite Free Surface
• C. Not significant
• D. Stability changes only in open sea

Answer: (A)

Flooding Effect Diagram colors show how entering water changes a vessel’s stability. Pink marks the conditions where stability declines even with the free surface present, meaning the righting capability is reduced as flooding occurs. This happens because added flood water increases weight and lowers the stability, while the free surface in partially filled compartments allows water to move with heel, further reducing the restoring moment. So pink is a warning of a significant stability loss that needs immediate actions like isolating the flood and dewatering. The other options don’t fit because pink specifically indicates the decrease in stability under flooding with free surface.