FPFF Exit Exam • Set 4 Question 11 of 30

You are fighting a fire in a watertight compartment using hoses and river water. Stability may be reduced because of:

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Direct Answer

Option C: Increase in free surface which reduces the metacentric height (GM)

Accumulation of large quantities of firefighting water on decks or inside compartments creates a free surface effect, which elevates the ship's virtual center of gravity (KG) and reduces metacentric height (GM), impairing vessel stability.

All Options

Reduction of water in the storage tanks

Progressive down flooding

Increase in free surface which reduces the metacentric height (GM) (Correct Answer)

Reduction of KG to the minimum allowable

Detailed Explanation & Context

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Fire Prevention & Fire Fighting (FPFF).

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