How to Conduct Inclination Experiment on Board?

 > STABILOGRAPH is the tool used to conduct Inclination Experiment

> Stabilograph is a special tool consisting of a heavy metal pendulum balanced on a knife edge and connected to a pointer to record the heel angle readings.

Must Read: Inclining Experiment  Theory And Explanation 


> The experiment must be carried out very carefully to ensure accurate results.

> It must be calm with no wind, no disturbance from waves

> sufficient water under the ship.

> All pipes, boilers, expansion tanks are to be filled according to normal sailing condition

> At least two pendulums are used, one forward and one aft. They are made as long as possible and are suspended from some convenient point, e.g. the underside of the hatch.

> A stool is arranged in the way of each pendulum on which the deflections are recorded.

> The pendulum bobs are immersed in water or light oil to dampen the swing.


> Four masses A, B, C and D are placed on the deck, two on each side of the ship near midships, their centres being as far as possible from the centreline.

> The mooring ropes are slackened and the ship-to-shore gangway removed. The draughts and density of water are read as accurately as possible.

> The inclining masses are then moved, one at a time, across the ship until all four are on one side, then all four on the other side and finally two on each side.

> The deflections of the pendulums are recorded for each movement of mass.

> An average of these deflections is used to determine the metacentric height.

> The experiment should be carried out in calm weather.

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