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Category Archives: Stability

The Trapezoidal Rule

Stability is the science of calculating the ability of ship to remain upright in all Conditions of weather and seas. One of the important aspects of determining such stability is the knowledge of areas and the volumes of the ship. Even though practical stability calculations

inclining experiment

Inclining Experiment

Why the vessel has to be inclined ??? To obtain the metacentric height it is necessary to determine the position of the centre of gravity `G’. This calculation consists of two parts.  a) The first is the finding of the height of the metacentre ‘M’

stable equilibrium

Transverse Stability

Basic Understanding In very broad terms, the ability of a vessel to maintain the true vertical can be termed as the measure of her Transverse Stability. Transverse Stability is the ability of the vessel to return to vertical when she has been heeled. The heeling


Grounding Theory & Numericals

Theory 1. Grounding is similar to dry-docking, but with certain modifications as follows : a.  Ship may have any displacement. b.  Trim may be by the stern or by the head or the ship may be on even keel. c.  The point of contact on

Dry Docking (Theory & Numericals)

Theory 1. During dry docking the ship shall be in as light a condition as possible. 2. It shall be trimmed by the stern. 3. Minimum trim required for safe and convenient docking is prescribed by the dock authorities. 4. Chief Officer shall ensure that

Bilging (Theory & Numericals)

What is Bilging Bilging is said to occur when ingress of water takes place into the vessel from a point below the waterline, such that the water is free to flow in and out of the vessel. If the water enters the vessel from above

Damage Stability

Reg. 25 Ch II – 1 of SOLAS deals with subdivision & damage stability of Cargo Ships. Reg.25-8: Master shall be supplied with such reliable information so as to have raid & simple means to obtain accurate guidance as to stability under varying conditions of

Angle Of Loll

When a ship with negative initial metacentric height is inclined to a small angle, the righting lever is negative, resulting in a capsizing moment. This effect is shown in Figure and it can be seen that the ship will tend to heel still further. At


APPLICATION a) The Code applies to cargo ships, timber carriers, grain carriers, container ships, cargo ships carrying containers on deck, passenger ships, fishing vessels, special purpose ships, offshore supply vessels, mobile offshore drilling units, pontoons and dynamically supported craft. b) Special purpose ship means a