Class 2 (2nd Engineer) SC&S 📅 Jul 2019

Exam Question

(a) Define longitudinal center of gravity (LCG) and longitudinal center of buoyancy (LCB). (6)

(b) A ship 120m long floats at draughts of 5.50m forward and 5.80m aft; MCT 1cm 80 tonne m, TPC 13, LCF 2.5m forward of midships. Calculate the new draughts when a mass of 110 tonne is added 24m aft of midships. (10)

Reference Answer

(a) Longitudinal Centre of Gravity (LCG):
The Longitudinal Centre of Gravity (LCG) is the point along the length of the vessel where the total weight of the ship is considered to act vertically downward.
It represents the balance point of the ship's weight distribution and is measured as a distance forward or aft of the midship.
Longitudinal Centre of Buoyancy (LCB):

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