Class 4 (4th Engineer) SC&S 📅 Sep 2022

Exam Question

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

(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
Reserve buoyancy is the volume of the enclosed and watertight part of a ship above its operational waterline. It represents the potential buoyancy that can be utilized to keep the vessel afloat in adverse conditions or in the event of damage.
**Key Characteristics and Importance:**
* **Definition:** It is the difference between the total volume of the enclosed hull and the volume of displacement up to the summer load line. Essentially, it is the volume of the ship that can be submerged before water enters the hull through any openings.

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