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International Code On Intact Stability
The International Code on Intact Stability (IS Code) is the International Maritime Organization (IMO) standard for ship stability 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 center of mass#center of gravity, centers of .... History The Code for Intact Stability was first issued in 1993 under IMO resolution A.749(18)). In 2008, the Code was updated by the IMO. In December 2019, amendments to the Code were adopted that entered into force on 1 January 2020. These amendments related to ships engaged in anchor handling operations and to ships carrying out lifting and towing operations. Content The Code contains both mandatory regulations and recommended provisions, setting out the minimum stability standards for ships. This includes information on precautions against capsizing, metacentric heights (GM), righting levers (GZ) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Maritime Organization
The International Maritime Organization (IMO; ; ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations responsible for regulating maritime transport. The IMO was established following agreement at a UN conference held in Geneva in 1948 and the IMO came into existence ten years later, meeting for the first time on 17 March 1958. Headquartered in London, United Kingdom, the IMO, in 2024, has 176 Member States and three Associate Members. The IMO's primary purpose is to develop and maintain a comprehensive regulatory framework for shipping and its remit today includes maritime safety, environmental concerns, and Admiralty law, legal matters, among other issues. IMO is governed by an assembly of members which meets every two years. Its finance and organization is administered by a council of 40 members elected from the assembly. The work of IMO is conducted through five committees and these are supported by technical subcommittees. Other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Stability
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 center of mass#center of gravity, centers of gravity, buoyancy, centers of buoyancy, the metacenters of vessels, and on how these interact. History Ship stability, as it pertains to naval architecture, has been taken into account for hundreds of years. Historically, ship stability calculations relied on rule of thumb calculations, often tied to a specific system of measurement. Some of these very old equations continue to be used in naval architecture books today. However, the advent of calculus-based methods of determining stability, particularly Pierre Bouguer's introduction of the concept of the metacenter in the 1740s ship model basin, allow much more complex analysis. Master shipbuilders of the past used a system of adaptive and variant design. Ships were often copied from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Witherby Publishing Group
Witherby Publishing Group, formerly known as Witherby Seamanship, is a technical publisher of maritime, nautical and navigation training, reference and regulatory materials. The company is the resulting merger of Witherby Books and Seamanship International in January 2008. Beginning with its origins in 1740 it lays claim to being the oldest independent publisher in the English-speaking world. Witherbys publish guidance titles with numerous shipping bodies and maritime NGOs. These include the International Chamber of Shipping, the UK Chamber of Shipping, BIMCO, OCIMF, SIGTTO, North P&I, the UK P&I Club, the International Association of Classification Societies, the Merchant Navy Training Board and the Institute of Marine Engineering, Science and Technology (IMarEST), as well as acting as an official electronic distributor for the International Maritime Organization. Witherbys are an official distributor of INTERTANKO publications. The company holds working gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metacentric Height
The metacentric height (GM) is a measurement of the initial static stability of a floating body. It is calculated as the distance between the centre of gravity of a ship and its '' metacentre''. A larger metacentric height implies greater initial stability against overturning. The metacentric height also influences the natural period of rolling of a hull, with very large metacentric heights being associated with shorter periods of roll which are uncomfortable for passengers. Hence, a sufficiently, but not excessively, high metacentric height is considered ideal for passenger ships. Different centres The ''centre of buoyancy'' is at the centre of mass of the volume of water that the hull displaces. This point is referred to as B in naval architecture. The '' centre of gravity'' of the ship is commonly denoted as point G or CG. When a ship is at equilibrium, the centre of buoyancy is vertically in line with the centre of gravity of the ship. The metacentre is the point where th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Free Surface Effect
The free surface effect is a mechanism which can cause a watercraft to become unstable and capsize. It refers to the tendency of liquids — and of unbound aggregates of small solid objects, like seeds, gravel, or crushed ore, whose behavior approximates that of liquids — to move in response to changes in the attitude of a craft's cargo holds, decks, or liquid tanks in reaction to operator-induced motions (or sea states caused by waves and wind acting upon the craft). When referring to the free surface effect, the condition of a tank that is not full is described as a "slack tank", while a full tank is "pressed up". Stability and equilibrium In a normally loaded vessel any rolling from perpendicular is countered by a righting moment generated from the increased volume of water displaced by the hull on the lowered side. This assumes the center of gravity of the vessel is relatively constant. If a moving mass inside the vessel moves in the direction of the roll, this counters t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritime Safety
Maritime safety as part of and overlapping with water safety is concerned with the protection of life ( search and rescue) and property Property is a system of rights that gives people legal control of valuable things, and also refers to the valuable things themselves. Depending on the nature of the property, an owner of property may have the right to consume, alter, share, re ... through regulation, management and technology development of all forms of waterborne transportation. The executive institutions are the national and transnational maritime administrations. maritime accidents, while characterized by a level of safety of the order of 10−5 (1 serious accident per 100,000 movements), which is only slightly inferior to that of the field of air transportation (10−6) are a significant source of risk for insurance companies, transport companies and property owners. Beyond that, of course, ship owners and maritime institutions have to ensure that casualties at se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
