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Class 4 (4th Engineer) SC&S 📅 Feb 2025

Exam Question

(a) What are the different types of stern used in ship construction? (6)

(b) A ship consumes 360 t of fuel, stores and water when moving from sea water of 1.025 t/m3 into fresh water of 1.000 t/m3 and on arrival it is found that the draught has remained constant. Calculate the displacement in sea water. (10)

Exam question diagram

Reference Answer

### (a) Different Types of Sterns Used in Ship Construction
The stern of a ship is its aftermost part, and its design significantly impacts the vessel's hydrodynamic performance, seakeeping characteristics, construction complexity, and operational functionality. Modern shipbuilding employs several distinct types of sterns, each offering specific advantages and disadvantages for different vessel types and operational profiles.
1. **Cruiser Stern (or Canoe Stern)**
* **Description**: This is the most common type of stern found on modern merchant and naval vessels. It is characterized by its smooth, rounded, and finely tapered shape, which extends well below the waterline and continues upwards in a graceful curve. The rudder and propeller are typically fully submerged and protected beneath the hull.

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