Class 2 (2nd Engineer) SC&S 📅 Dec 2022

Exam Question

(a) Explain how to distinguish between list and loll and describe how to return the ship to the upright in each case (6)

(b) A ship of 5000 tonne displacement has a double bottom tank 12m long. The 1/2 breaths of the top of the tank are 5, 4 and 2m respectively. The tank has a watertight centreline division. Claculate the free surface effect if the tank is partially full of fresh water on one side only (10)

Reference Answer

(a) Distinguishing between List and Loll:
1. List is caused by Uneven distribution of weight within the ship. List will have the below conditions:
GM is positive (GM > 0).
The centre of gravity (G) is off-centre.

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