Class 4 (4th Engineer) SC&S 📅 May 2023

Exam Question

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

(b) The centre of gravity of a ship of 5000 tonne displacement is 6 m above the keel and 1.5 m forward of midships. Calculate the new position of the centre of gravity if 500 tonne of cargo are placed in the t'ween decks 10 m above the keel and 36 m aft of midships. (10)

Reference Answer

### (a) Explanation of Reserve Buoyancy
**1. Definition:**
Reserve buoyancy is the volume of the enclosed, watertight part of a ship located **above the waterline**. It represents the potential buoyancy that can be utilized to keep the vessel afloat in the event of flooding or when encountering large waves. It is, in essence, the ship's safety margin against sinking.
**2. Purpose and Function:**

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