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

Exam Question

(a) Describe the function of the 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 draupht and the draught at which the ship would lie in sea water with the same displacement. (10)

Reference Answer

### Part (a): Function of the Stern Frame (6 Marks)
The stern frame is a critical structural member located at the aft end of the ship. It is a large, robust casting or fabrication that forms the backbone of the stern structure. Its primary functions are as follows:
1. **Structural Integrity:**
* **Backbone of the Stern:** The stern frame provides the main structural connection between the keel, the transom framing (floors and beams), and the shell plating at the aft end of the vessel.

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