RULES FOR THE CLASSIFICATION OF SHIPS PART 4 – STABILITY January 2020 CROATIAN REGISTER OF SHIPPING Hrvatska (Croatia) • 21000 Split • Marasovićeva 67 • P.O.B. 187 Tel.: (...) 385 (0)21 40 81 11 Fax.: (...) 385 (0)21 35 81 59 E-mail: [email protected] web site: www.crs.hr By the decision of the General Committee to the Croatian Register of Shipping, RULES FOR THE CLASSIFICATION OF SHIPS Part 4 – STABILITY edition January 2020 have been adopted on 20th December 2019 and shall enter into force on 1st January 2020 RULES FOR THE CLASSIFICATION OF SHIPS PART 4 REVIEW OF AMENDMENTS IN RELATION TO PREVIOUS EDITION OF THE RULES RULES FOR THE CLASSIFICATION OF SHIPS Part 4 – STABILITY All major changes in respect to the Rules for the classification of ships, Part 4 – Stability, edition 2013, as last amended by Amendments No. 3, edition July 2018 throughout the text are shaded (if any). Items not being indicated as corrected have not been changed. The grammar and print errors, have been corrected throughout the Rules and are not subject to above indication of changes. 2020 RULES FOR CLASSIFICATION OF SHIPS PART 4 This part of the Rules includes the requirements of the following international organisations: International Maritime Organization (IMO) Conventions: International Convention for the Safety of Life at Sea 1974 (SOLAS 1974) and all subsequent amendments up to and including the 2017 amendments (MSC.421(98)), and Conference on Bulk Carriers 1997 amendments. Protocol of 1988 relating to the International Convention for the Safety of Life at Sea 1974, as amended (SOLAS PROT 1988). International Convention for the Prevention of Polution from Ships 1973, as modified by the Protocol of 1978 thereto (MARPOL 73/78) and all subsequent amendments up to and including the 2015 amendments (MEPC. 248(66)). Resolutions: MEPC.117(52); MEPC.248(66); MSC.235(82); MSC.398(95); A.715(17); MSC.413(97); MSC.415(97); MSC.421(98); MSC.436(99); MSC.443(99); MSC.444(99) Codes: International Code on Intact Stability, 2008 (MSC.267(85)), as amended with the 2016 amendments (MSC.444/(99) International Association of Classification Societies (IACS) Unified Requirements (UR): L2 (Rev.2, 2013); L5 (Rev.3, 2017) Unified Interpretations: LL80, MPC11 (Rev. 2, 2016), SC161 (Rev. 1, 2008), SC280 2020 RULES FOR CLASSIFICATION OF SHIPS PART 4 Contents Page 1 GENERAL ............................................................................................................................................................. 1 1.1 APPLICATION .......................................................................................................................................................................... 1 1.2 DEFINITIONS AND EXPLANATIONS ................................................................................................................................... 1 1.3 SCOPE OF SUPERVISION ....................................................................................................................................................... 3 1.4 TECHNICAL REQUIREMENTS IN PREPARING STABILITY INFORMATION ................................................................ 4 1.5 STABILITY INFORMATION FOR THE MASTER ................................................................................................................. 9 1.6 OPERATIONAL PROVISIONS AGAINST CAPSIZING ...................................................................................................... 12 1.7 DETERMINATION OF LIGHT-SHIP DISPLACEMENT AND CENTRES OF GRAVITY ................................................. 13 1.8 DEPARTURES FROM THE RULES ...................................................................................................................................... 17 1.9 CONDITIONS OF SUFFICIENT STABILITY ....................................................................................................................... 17 1.10 PASSAGE OF SHIPS FROM ONE PORT TO ANOTHER .................................................................................................... 18 2 GENERAL REQUIREMENTS ON STABILITY ............................................................................................ 19 2.1 GENERAL INTACT STABILITY CRITERIA ....................................................................................................................... 19 2.2 ALLOWANCE FOR ICING .................................................................................................................................................... 22 3 ADDITIONAL REQUIREMENTS FOR STABILITY ................................................................................... 24 3.1 PASSENGER SHIPS ................................................................................................................................................................ 24 3.2 DRY CARGO SHIPS ............................................................................................................................................................... 25 3.3 TIMBER CARRIERS ............................................................................................................................................................... 26 3.4 TANKERS ................................................................................................................................................................................ 28 3.5 FISHING VESSELS ................................................................................................................................................................. 30 3.6 SPECIAL PURPOSE SHIPS .................................................................................................................................................... 31 3.7 SHIPS ENGAGED IN TOWING AND ESCORT OPERATIONS .......................................................................................... 32 3.8 VESSELS OF DREDGING FLEET ......................................................................................................................................... 36 3.9 CONTAINER SHIPS (UP TO 100 M IN LENGTH) ............................................................................................................... 39 3.10 CONTAINERSHIPS GREATER THAN 100 M IN LENGTH ................................................................................................ 40 3.11 OPEN-TOP CONTAINERSHIPS ............................................................................................................................................ 41 3.12 OFFSHORE SUPPLY VESSELS............................................................................................................................................. 42 3.13 CARGO SHIPS CARRYING GRAIN IN BULK..................................................................................................................... 44 3.14 HIGH - SPEED CRAFT ........................................................................................................................................................... 44 3.15 SHIPS ENGAGED IN ANCHOR HANDLING OPERATIONS ............................................................................................. 44 3.16 SHIPS ENGAGED IN LIFTING OPERATIONS .................................................................................................................... 48 3.17 COMMERCIAL YACHTS ...................................................................................................................................................... 52 4 REQUIREMENTS FOR THE STABILITY OF PONTOONS, PONTOON-CRANES, DOCKS AND BERTH-CONNECTED SHIPS ................................................................................................. 54 4.1 PONTOONS ............................................................................................................................................................................. 54 4.2 FLOATING CRANES .............................................................................................................................................................. 54 4.3 FLOATING DOCKS ................................................................................................................................................................ 57 4.4 BERTH-CONNECTED SHIPS ................................................................................................................................................ 57 APPENDIX 1 INSTRUCTIONS ON DRAWING UP THE STABILITY BOOKLET ............................................. 59 APPENDIX 2 DETERMINATION OF CAPSIZING MOMENT ............................................................................. 62 1 DETERMINATION OF THE CAPSIZING MOMENT OF PASSENGER, CARGO AND FISHING VESSELS ................. 62 2 DETERMINATION OF CAPSIZING MOMENT FOR DREDGERS ..................................................................................... 63 APPENDIX 3 INSTRUCTIONS FOR DETERMINATION OF THE SHIP'S CENTRE OF GRAVITY BY INCLINING TEST ................................................................................................................ 65 1 GENERAL ................................................................................................................................................................................ 65 2 WEATHER CONDITIONS AND SHIP'S POSITION DURING THE TEST ......................................................................... 65 3 MOORING ARRANGEMENTS .............................................................................................................................................