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

Exam Question

(a) Describe the function of stern frame (6)

(b) The water plane area of a ship at 8.4 m draught is 1670 m2 The area of successive water planes at 1.40 m intervals below this are 1600, 1540, 1420, 1270, 1080 and 690 m2 respectively. Calculate the displacement in fresh water at 8.4 m draught and the draught at which the ship would lie in sea water with the same displacement. (10)

Reference Answer

### Part (a): Function of a Stern Frame
The stern frame is a critical structural member at the aft end of a ship. It is typically a large, single casting or a complex fabrication of steel plates and sections, designed to withstand significant hydrodynamic and mechanical stresses. Its primary functions are as follows:
1. **Structural Integrity:**
* The stern frame forms the terminal structure of the ship's hull, connecting the port and starboard shell plating and keel.

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