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

Exam Question

(a) Explain, with reference to moments about the centerline, how the list may be removed. (6)

(b) A ship of 12,250 tonnes displacement, has KM = 8 metres, KB = 3.8 metres, KG = 8 meters and is floating upright. Find the list if a weight of 2 tonnes, already on board, is shifted transversely through a horizontal distance of 12 metres assuming that the ship is wall-sided. (10)

Reference Answer

### (a) Removing a List with Reference to Moments about the Centerline
A list is a permanent transverse inclination of a vessel caused by an unequal distribution of weight about the centerline, which moves the ship's center of gravity (G) off the centerline. The list may be removed by creating a corrective moment equal and opposite to the listing moment.
**1. Understanding the Listing Moment:**
* When weight is distributed asymmetrically, the ship's center of gravity (G) shifts horizontally from the centerline to a new position (G₁).

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