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Tomasz Neumann
 

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Gdynia Maritime University
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The Need of the Revision of Passenger Ships' Stability Criterion on Account of Turning
1 Maritime University of Szczecin, Szczecin, Poland
ABSTRACT: The angle of heel on account of turning is one of the mandatory stability criteria for passenger ships. Formula used for calculations of this criterion contained in the International Code on Intact Stability [13] is criticized at present. Agendas of the Sub-committee on Ship Design and Construction (SDC) for the first (2014) and the second (2015) sessions contain the item on revision of this criterion and corresponding regulation. The paper presents some shortcomings of the criterion. Turning tests of a freely maneuvering model of a passenger ship have been executed aiming at gathering data for the future discussion and its facilitation. The paper presents results of the tests together with preliminary conclusions that confirm the need of the revision of the regulation and put forward concerns on application of such values as initial metacentric height (GMo) and righting lever curve (GZ(φ)) calculated for a ship laying still for calculation of a ship's heel caused by turn.
REFERENCES
International Maritime Organization, document SLF 51/4/1, Annex 2, Framework for the Second Generation Intact Stability Criteria, London 2008, UK.
International Maritime Organization, document SLF 54/WP.3, Report of the Working Group, part 1, London 2011, UK.
International Maritime Organization, document SLF 55/12, Revised proposals for amending the 2008 IS Code, Submitted by the Royal Institution of Naval Architects (RINA), London 2012, UK.
International Maritime Organization, document SDC 1/5/3, Report of the Intersessional Correspondence Group on Intact Stability, submitted by Japan, London 2014, UK.
International Maritime Organization, document SDC 1/14/1, Proposal for the structure of the criterion for maximum angle of heel in turns of the 2008 IS Code, Submitted by Poland, London 2014, UK.
Kobyliński L.K., Kastner S., Stability and safety of ships, Volume 1: Regulation and Operation; Elsevier Ocean Engineering Book Series, Volume 9, 2005.
Szozda Z.: Application of the TRIPOD method for human factor analysis on the example of m/f Jan Heweliusz capsizing, Proceedings of the 10th International Conference on Stability of Ships and Ocean Vehicles, STAB 2009, St. Petersburg, Russia.
Szozda Z.: Criteria and standards for Pure Loss of Stability in the frame of the 2nd Generation Intact Stability Criteria, 19th International Conference on Hydrodynamics in Ship Design; 4th International Symposium on Ship Manoeuvring HYDRONAV 2012, Iława, 2012, Poland.
Sobolev G.V., Obrastsov W.B.: The calculation of the Righting Moment for a Moving Ship with an Initial Angle of Heel, Report, The University of Michigan, 1970, USA.
Obrastsov W.B.: Experimental Investigation of Influence of Ship’s Speed on its Transverse Stability, Report, The University of Michigan, 1970, USA.
Taylan M.: Effect of Forward Speed on Ship Rolling and Stability, Mathematical & Computational Applications, Vol 9, No. 2, 2004.
Tragardh P.: Roll motion of manoeuvring ships, International Conference on Marine Simulation and Ship Manoeuvrability, MARSIM 2003, Kanazawa, Japan.
International Maritime Organization, International Code on Intact Stability, Resolution MSC.267(85), London, 2008, UK.
Citation note:
Szozda Z.: The Need of the Revision of Passenger Ships' Stability Criterion on Account of Turning. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 8, No. 3, doi:10.12716/1001.08.03.10, pp. 393-399, 2014

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