Question

(a) List the precautions necessary before an inclining experiment is carried out (6)

(b) A box shaped vessel, 50 metres long x 10 metres wide, floats in salt water on an even keel at a draft of 4 metres. A center line longitudinal watertight bulkhead extends from end to end and for the full depth of the vessel. A compartment amidships on the starboard side is 15 metres long and contains cargo with permeability 30%. Calculate the list if this compartment is bilged. KG = 3 metres. (10)

Answer 1

Part (a)

Precautions necessary before an Inclining experiment:

The ship should be in a sheltered position, such as a gravity dock, to minimize external influences from wind or waves.
Mooring ropes should be slack to allow the ship to move freely without restrictions.
Only workers essential to the experiment should be present onboard to avoid unnecessary weight and movement.
All tanks must either be completely empty or pressed up tight to eliminate the free surface effect, which can adversely affect stability calculations.
Any loose weights on the ship must either be removed or properly secured to prevent unintended movement during the experiment.
Ensure that the pendulums are long and properly suspended from stable points, such as underneath a hatch, to provide accurate deflection readings.
The test masses should be evenly distributed and placed as far from the centerline as possible to maximize measurable deflections.
The experiment should be carried out in calm weather to avoid the effects of wind, current, or waves on the vessel's stability.

✓ Verified Model Answer (Text Solution)

Precautions necessary before an Inclining experiment: