Refresher Exit Exam • Set 2 Question 6 of 30
You are fighting a fire in a watertight compartment using hoses and river water. Stability may be reduced because of:
✓
Direct Answer
Option C: Increase in free surface which reduces the metacentric height (GM)
Free surface effect occurs when a compartment is partially filled with water, causing the center of gravity to shift and significantly reducing the metacentric height (GM), affecting stability.
All Options
A
Reduction of water in the storage tanks
B
Reduction of KG to the minimum allowable
C
Increase in free surface which reduces the metacentric height (GM)
(Correct Answer)
D
Progressive down flooding
Detailed Explanation & Context
Free surface effect occurs when a compartment is partially filled with water, causing the center of gravity to shift and significantly reducing the metacentric height (GM), affecting stability.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Refresher Course for STCW Modular Courses (Refresher).
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