Class 4 (4th Engineer) SC&S 📅 Feb 2026

Exam Question

(a) What are the water pressure loads on the ship's hull? (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

### (a) Water Pressure Loads on the Ship's Hull (6 Marks)
The water pressure loads acting on a ship's hull can be categorized into two main types: Static Loads (Hydrostatic) and Dynamic Loads (Hydrodynamic).
#### 1. Static (Hydrostatic) Loads
These are the forces exerted by the water on the hull when the ship is at rest in calm, still water. They are a function of the water density and the depth.

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