7.1 The intact stability characteristics of any ship carrying bulk grain shall be shown to meet, throughout the voyage, at least the following criteria after taking into account in the manner described in part B of this Code and, in figure A7, the heeling moments due to grain shift:
Notes on figure A7:
Stowage factor - volume per unit weight of grain cargo; Displacement = weight of ship, fuel, fresh water, stores etc. and cargo.
(2) The righting arm curve shall be derived from cross curves which are sufficient in number to accurately define the curve for the purpose of these requirements and shall include cross-curves at 12° and 40°.
.1 the angle of heel due to the shift of grain shall not be greater than 12° or in the case of ships constructed on or after 1 January 1994 the angle at which the deck edge is immersed, whichever is the lesser;
.2 in the statical stability diagram, the net or residual area between the heeling arm curve and the righting arm curve up to the angle of heel of maximum difference between the ordinates of the two curves, or 40° or the angle of flooding (θ1), whichever is the least, shall in all conditions of loading be not less than 0.075 metre-radians; and
.3 the initial metacentric height, after correction for the free surface effects of liquids in tanks, shall be not less than 0.30 m.
7.2 Before loading bulk grain the master shall, if so required by the Contracting Government of the country of the port of loading, demonstrate the ability of the ship at all stages of any voyage to comply with the stability criteria required by this section.
7.3 After loading, the master shall ensure that the ship is upright before proceeding to sea.
8. STABILITY REQUIREMENTS FOR EXISTING SHIPS
8.1 For the purposes of this section the term "existing ship" means a ship, the keel of which is laid before 1 January 1994.
8.2 An existing ship loaded in accordance with documents previously approved under regulation 12 of chapter VI of SOLAS 1960, IMO resolutions A. 184(VI) or A.264(VIII) shall be considered to have intact stability characteristics at least equivalent to the requirements of A7 of this Code. Documents of authorization permitting such loadings shall be accepted for the purposes of A7.2.
8.3 Existing ships not having on board a document of authorization issued in accordance with A3 of this Code may apply the provisions of A9 without limitation of the deadweight which may be used for the carriage of bulk grain.
Date: 2014-12-21; view: 3563