Canada Oil and Gas Installations Regulations — 58
58 (1) Every mobile offshore platform shall be equipped with ballast tanks the number, location and degree of subdivision of which, together with the associated equipment, are (a) capable of ballasting and trimming the platform efficiently under all reasonably anticipated environmental conditions; and (b) designed to be fail safe. (2) Every floating platform shall have a ballast system so arranged that any ballast tank can be filled or emptied by any one of at least two ballast pumps or by controlled free flow. (3) Each lower hull on a floating platform with two lower hulls shall be provided with at least two ballast pumps each with the capacity to fill or empty any ballast tank in that hull. (4) The ballast system for a column-stabilized mobile offshore platform shall be designed to prevent uncontrolled transfer of water between tanks or through sea-connected inlets or discharges in any one of the following situations: (a) the failure of any valve or valve actuator for the system; (b) the failure in the means of control or indication for the system; and (c) the flooding of any space that contains equipment associated with the system. (5) Ballast piping in a ballast system for a floating platform that leads from a pump to more than one tank shall be led from readily accessible manifolds. (6) All power-operated sea inlets, discharge valves and ballast tank isolating valves on a floating platform shall be designed to close automatically on loss of control power and remain closed when power is re-established until specific action is taken to open them. (7) Where crude oil is to be stored in a floating platform, the platform shall have enough ballast capacity, segregated from the crude storage, to be able to float at minimum operating draft with no crude oil on board. (8) Every floating platform shall be provided with a main ballast control station equipped with (a) an effective means of communication with other spaces that contain equipment relating to the operation of the ballast system; (b) a ballast pump control and status system; (c) a ballast valve control and status system; (d) a tank level indicating system; (e) a draft indicating system; (f) emergency lighting; (g) heel and trim indicators; (h) bilge and flood alarms; and (i) remote control indicators for watertight closing appliances. (9) Every column-stabilized mobile offshore platform shall be equipped with a secondary ballast control station equipped with (a) an effective means of communication with other spaces that contain equipment relating to the operation of the ballast system; (b) a ballast pump control and status system; (c) a ballast valve control and status system; (d) a tank level indicating system; (e) emergency lighting; (f) heel and trim indicators; and (g) a permanently mounted ballast schematic diagram. (10) The main and secondary ballast control stations required by subsections (8) and (9) shall be located above the waterline in the final condition of equilibrium after flooding when the platform is in a damaged condition. (11) Every column-stabilized mobile offshore platform shall have a ballast system that is capable, with any ballast pump out of operation, (a) of providing safe handling and operation of the platform under normal operating and transit conditions; (b) of restoring the platform to a normal operating or transit draft and level trim from an inclination of 15 degrees in any direction; and (c) of raising the platform from the deepest operating draft to severe storm draft within three hours. (12) Every floating platform shall be equipped with a bilge system that has at least two bilge pumps connected to the bilge main and that is capable, under all conditions from upright to 15 degrees in any direction, of pumping or draining any watertight compartment except for those spaces permanently designated for the storage of fresh water, water ballast, fuel oil or liquid cargo and for which other effective means of pumping are provided. (13) No floa