Commonwealth Consolidated Regulations

NAVIGATION (CONSTRUCTION) REGULATIONS 1968 - REG 13

(1)

Where a double bottom is fitted to a ship in pursuance of the last preceding regulation, its depth shall not be less than that determined by a naval architect and its inner bottom shall be continued out to the sides of the ship in such a manner as to protect the ship to the turn of the bilge.

(2)

The inner bottom shall be deemed to comply with the last preceding subregulation if the line of intersection of the outer edge of the margin plate of the inner bottom with the shell plating of the ship is not lower at any point than a horizontal plane passing through the point of intersection of the frame line amidships with a line inclined at an angle of twenty-five degrees to the base line amidships and cutting that base line at a point one half of the ship's moulded breadth from the middle line.