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Commission Directive 2005/12/ECShow full title

Commission Directive 2005/12/EC of 18 February 2005 amending Annexes I and II to Directive 2003/25/EC of the European Parliament and of the Council on specific stability requirements for ro-ro passenger ships (Text with EEA relevance)

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Changes over time for: Division 3.

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3.Ship modelU.K.

3.1.The model should copy the actual ship for both outer configuration and internal arrangement, in particular all damaged spaces having an effect on the process of flooding and shipping of water. Intact draught, trim, heel and limiting operational KG corresponding to the worst damage case should be used. Furthermore, the test case(s) to be considered should represent the worst damage case(s) defined in accordance with SOLAS regulation II-1/8.2.3.2 (SOLAS 90) with regard to the total area under the positive GZ curve and the centreline of the damage opening should be located within the following range:U.K.
3.1.1.± 35 % LBP from midship;U.K.
3.1.2.an additional test will be required for the worst damage within ± 10 % LBP from midship if the damage case referred to in .1 is outside of ± 10 % LBP from midship.U.K.
3.2.The model should comply with the following:U.K.
3.2.1.length between perpendiculars (LBP) is to be at least 3 m or a length corresponding to a model scale of 1:40, whichever is greater, and the vertical extent up to at least three superstructure standard heights above the bulkhead (freeboard) deck;U.K.
3.2.2.hull thickness of flooded spaces should not exceed 4 mm;U.K.
3.2.3.in both intact and damaged conditions, the model should satisfy the correct displacement and draught marks (TA, TM, TF, port and starboard) with a maximum tolerance in any one draught mark of + 2 mm. Draught marks forward and aft should be located as near FP and AP as practicable;U.K.
3.2.4.all damaged compartments and ro-ro spaces should be modelled with the correct surface and volume permeabilities (actual values and distributions) ensuring that floodwater mass and mass distribution are correctly represented;U.K.
3.2.5.the characteristics of motion of the actual ship should be modelled properly, paying particular attention to the intact GM tolerance and radii of gyration in roll and pitch motion. Both radii should be measured in air and be in the range of 0,35B to 0,4B for roll motion, and 0,2LOA to 0,25LOA for pitch motion;U.K.
3.2.6.main design features such as watertight bulkheads, air escapes, etc., above and below the bulkhead deck that can result in asymmetric flooding should be modelled properly as far as practicable to represent the real situation; Ventilating and cross-flooding arrangements should be constructed to a minimum cross section of 500 mm2;U.K.
3.2.7.the shape of the damage opening should be as follows:U.K.
1.

trapezoidal profile with side at 15° slope to the vertical and the width at the design waterline defined according to SOLAS regulation II-1/8.4.1;

2.

isosceles triangular profile in the horizontal plane with the height equal to B/5 according to SOLAS regulation II-1/8.4.2. If side casings are fitted within B/5, the damaged length in way of the side casings should not be less than 25 mm;

3.

notwithstanding the provisions of subparagraphs 3.2.7.1 and 3.2.7.2 above, all compartments taken as damaged in calculating the worst damage case(s) referred to in paragraph 3.1 should be flooded in the model tests;

3.3.The model in the flooded equilibrium condition should be heeled by an additional angle corresponding to that induced by the heeling moment Mh = max (Mpass; Mlaunch)-Mwind, but in no case should the final heel be less than 1° towards damage. Mpass, Mlaunch and Mwind are as specified in SOLAS regulation II-1/8.2.3.4. For existing ships this angle may be taken as 1°.U.K.

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