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#Ship construction terms code#
The 2008 IS Code provides, in a single document, both mandatory requirements and recommended provisions relating to intact stability that will significantly influence the design and the overall safety of ships.
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MSC 85 also adopted amendments to the SOLAS Convention and to the 1988 Load Lines Protocol to make the 2008 IS Code mandatory, which entered into force on 1 July 2010.
#Ship construction terms update#
In 2008, the Maritime Safety Committee, at its eighty-fifth session, adopted the International Code on Intact Stability, 2008 (2008 IS Code), following extensive considerations by the SLF Sub-Committee and taking into account technical developments, to update the 1993 Intact Stability Code. The IS Code also addressed related operational aspects like information for the master, including stability and operating booklets and operational procedures in heavy weather.
![ship construction terms ship construction terms](https://www.researchgate.net/publication/298912203/figure/fig16/AS:341351238520836@1458395885257/An-example-of-a-ship-compartments-and-structure-parts-Image-courtesy-of-EzSTRUCT.png)
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#Ship construction terms free#
The IS Code included fundamental principles such as general precautions against capsizing (criteria regarding metacentric height (GM) and righting lever (GZ)) weather criterion (severe wind and rolling criterion) effect of free surfaces and icing and watertight integrity. IMO has long developed intact stability criteria for various types of ships, culminating in the completion of the Code on Intact Stability for All Types of Ships Covered by IMO Instruments (IS Code) in 1993 (resolution A.749(18)) and later amendments thereto (resolution MSC.75(69)). Usually, the date from adoption to deemed acceptance is two years. Amendments enter into force six months after the deemed date of acceptance - which must be at least a year after the date of communication of adoption of amendments unless they are rejected by one-third of Parties. The 1988 Load Lines Protocol revised certain regulations in the technical Annexes to the Load Lines Convention and introduced the tacit amendment procedure (which was already applicable to the 1974 SOLAS Convention).Amendments to the Convention may be considered either by the Maritime Safety Committee or by a Conference of Parties.Īmendments must be adopted by a two-thirds majority of Parties to the Convention present and voting. The harmonized system alleviates the problems caused by survey dates and intervals between surveys which do not coincide, so that a ship should no longer have to go into port or repair yard for a survey required by one Convention shortly after doing the same thing in connection with another instrument. The Protocol was primarily adopted in order to harmonize the Convention's survey and certification requirement with those contained in SOLAS and MARPOL 73/78.Īll three instruments require the issuing of certificates to show that requirements have been met and this has to be done by means of a survey which can involve the ship being out of service for several days. The Convention includes Annex I, divided into four Chapters:Ĭhapter IV - Special requirements for ships assigned timber freeboards.Īnnex II covers Zones, areas and seasonal periods.Īnnex III contains certificates, including the International Load Line Certificate.Īdoption of tacit amendment procedure 1988 Ships intended for the carriage of timber deck cargo are assigned a smaller freeboard as the deck cargo provides protection against the impact of waves All assigned load lines must be marked amidships on each side of the ship, together with the deck line. The main purpose of these measures is to ensure the watertight integrity of ships' hulls below the freeboard deck. The technical annex contains several additional safety measures concerning doors, freeing ports, hatchways and other items. The regulations take into account the potential hazards present in different zones and different seasons. The first International Convention on Load Lines, adopted in 1930, was based on the principle of reserve buoyancy, although it was recognized then that the freeboard should also ensure adequate stability and avoid excessive stress on the ship's hull as a result of overloading. In the 1966 Load Lines convention, adopted by IMO, provisions are made determining the freeboard of ships by subdivision and damage stability calculations. These limits are given in the form of freeboards, which constitute, besides external weathertight and watertight integrity, the main objective of the Convention. It has long been recognized that limitations on the draught to which a ship may be loaded make a significant contribution to her safety.