![]() ![]() ![]() Why? Because, when the ship is inclined, the liquid in the tank shifts to the lower side of the tank, as shown in the following figure. When any tank or a compartment is partially filled, the motion of the liquid (due to the ship’s rolling and pitching motions) would reduce the stability of the ship. ![]() We will also relate each of these to real cases that have occurred in the past. Once the effect of each has been studied, we will then see what measures are taken in design and operational stages to prevent the same. We will first discuss some major cases of instability in surface ships. In practice, the main tools used for analysing the causes of all cases of instability of a ship are Loading Condition and Stability Curves.Ī certain level of intuition based on experience with surface ship stability also plays a major part in pointing out the cause for each case, which makes stability an even more interesting area of research in the field of naval architecture. Once the effect is known, the cause of the vessel instability is investigated. For each case of instability, a ship designer must first know the effect it would cause on the ship. A thorough knowledge on curves of intact stability can help us know and analyse real cases of instability caused in surface ships. ![]()
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