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

Exam Question

(a) Why is an inclining experiment carried out? Write a short account of the method adopted. (6)

(b) An inclining experiment was carried out on a ship of 8000 tonne displacement. The inclining ballast was moved transversely through 12 m and the deflections of a pendulum 5.5 m long, measured from the centreline, were as follows:

3 tonne port to starboard 64 mm S

3 tonne port to starboard 116 mm S

Ballast restored 3 mm S

3 tonne starboard to port 54 mm P

3 tonne starboard to port 113 mm P

Calculate the metacentric height of the vessel. (10)

Reference Answer

(a) An inclining experiment is conducted to determine a ship's metacentric height (GM) and, consequently, the location of its centre of gravity (CG). Knowing the CG of an empty vessel allows for calculations of its position under various loading conditions.
The inclining experiment is performed on:
Newly built ships.
After major alterations to the vessel.

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