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Class 4 (4th Engineer) SC&S 📅 Nov 2024

Exam Question

(a) Explain clearly the meaning of the term 'reserve buoyancy' (6)

(b) When a mass of 10 tonnes is shifted 12 m transversely across the deck of a ship with a GM of 0.6 m, it causes 0.25 m deflection in a 10 m plumb line. Calculate the ship's displacement. (10)

Reference Answer

### (a) Reserve Buoyancy
**1. Definition:**
Reserve buoyancy is the volume of the enclosed and watertight part of a ship located above the operational waterline. It represents the potential buoyancy that can be utilized to keep the vessel afloat if it takes on additional weight, for instance, through flooding or heavy seas washing over the decks. It is essentially the difference between the total volume of all enclosed spaces and the volume of displacement up to the summer load line.
**2. Purpose and Significance:**

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