Exam Question
Define centre of buoyancy and show with the aid of sketches how a vessel which is stable will return to the upright after being heeled by an external force. (16)
Class 4 (4th Engineer)
SC&S
📅 Nov 2024
Reference Answer
### 1. Definition of Centre of Buoyancy (B)
The Centre of Buoyancy (B) is defined as the geometric centre of the underwater, or immersed, volume of a vessel. It is the single point through which the total force of buoyancy (upthrust) is considered to act vertically upwards.
Key principles associated with the Centre of Buoyancy are:
* **Archimedes' Principle:** The buoyant force acting upwards through B is equal in magnitude to the weight of the volume of water displaced by the ship's hull.
The Centre of Buoyancy (B) is defined as the geometric centre of the underwater, or immersed, volume of a vessel. It is the single point through which the total force of buoyancy (upthrust) is considered to act vertically upwards.
Key principles associated with the Centre of Buoyancy are:
* **Archimedes' Principle:** The buoyant force acting upwards through B is equal in magnitude to the weight of the volume of water displaced by the ship's hull.
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