Ship Stability & Naval Architecture at Namfi

Ship Stability & Naval Architecture at Namfi

What is Ship Stability & Naval Architecture?

Ship stability is an area of naval architecture and ship design that deals with how a ship behaves at sea, both in still water and in waves, whether intact or damaged. Stability calculations focus on centers of gravity, centers of buoyancy, the metacenters of vessels, and on how these interact.


Ship’s stability is one of the most important and complex concept about safety of ship and safety of navigation and it is governed by maritime law as well as maritime codes. The paper presents the importance of ship’s intact stability as part of the general concept of ship’s seaworthiness.

Frequently Asked Questions

What is course stability of ship?

(1) A ship whose course keeping quality is unstable is made stable in the range of the wind velocity wind direction between specified maximums. (2) In the aft and quarter wind a ship becomes unstable, and in the head and bow wind the ship whose lateral projected area above the water line is large becomes unstable.

What are ship stabilizers called?

Traditional ship stabilisers (bilge Keels) are long strips of metal attached to the outer hull of the ship. They are noticeable where the bottom curve and vertical sides of the ship meet a little below the water line.

What is stable stability?

1 : the quality, state, or degree of being stable: such as. a : the strength to stand or endure : firmness. b : the property of a body that causes it when disturbed from a condition of equilibrium or steady motion to develop forces or moments that restore the original condition.

How is ship stability calculated?

The statical stability of ships is checked by comparing the righting-arm curve with the curves of heeling arms. A heeling arm is calculated by dividing a heeling moment by the ship displacement force.

What is trim stability and stresses?

The course covers understanding of fundamental principles of ship construction and the theories and factors affecting trim and stability and measures necessary to preserve trim and stability.

What is initial stability of a ship?

Initial stability or primary stability is the resistance of a boat to small changes in the difference between the vertical forces applied on its two sides.

What is positive stability in ship?

A stable vessel when upright is said to have a positive metacentric height (GM), i.e. when the metacentre (M) is found to be above the centre of gravity (G). This is usually referred to as having a positive GM or a positive initial stability.

What are the two types of ship stabilizers?

Depending on the planned use and type of boat, there are mainly three methods you can choose between: active tanks, gyro stabilizers, and active fin stabilizers. When designing a new yacht, we recommend thinking carefully through the advantages and disadvantages of the various options when choosing technology.

How do stabilizers work?

It is an electrical appliance which is designed to deliver a constant voltage to a load at its output terminals regardless of the changes in the input or incoming supply voltage. It protects the equipment or machine against over voltage, under voltage, and other voltage surges.

What is stability and its types?

Three type of stability are of concern: Steady state, transient and dynamic stability. Steady-state Stability:- Steady. -state stability relates to the response of synchronous machine to a gradually increasing load.

What is stability example?

Stability is the state of being resistant to change and not prone to wild fluctuations in emotion. An example of stability is a calm, stable life where you don’t have wild ups and downs.

What is stability factor?

Explanation: Stability factor is defined as the rate at which collector current changes when Base to emitter voltage changes, keeping base current constant. It can also be defined as the ratio of change in collector current to change in base current when temperature changes occur.

How is stability created?

A structure is stable if its centre of gravity lies above its base. An object is unstable when its centre of gravity lies outside its base. In other words, an object is unstable if a line drawn between its centre of gravity and the centre of the Earth does not pass through its base.

What is stability and balance?

Balance is your ability to control your body without movement against gravity. Stability is your ability to control your body during movement.

What are the stability skills?

Stability skills are movements where the body remains in place but moves around its horizontal and vertical axis. For example: balancing, stretching, bending and twisting. These skills are needed in order to progress on to locomotor and manipulative skills. Balancing in particular is important.