Section 8 Additional requirements for bilge drainage of passenger ships

8.1.1 In passenger ships, the power bilge pumps required by Pt 5, Ch 11, 6.1 Number of pumps 6.1.4 and Pt 5, Ch 11, 6.1 Number of pumps 6.1.5, are to be placed in separate watertight compartments which will not readily be flooded by the same damage. If the engines are in two or more watertight compartments, the bilge pumps are to be distributed throughout these compartments so far as is possible.

8.1.2 In passenger ships, the arrangements are to be such that at least one power pump will be available for use in all ordinary circumstances in which the ship may be flooded. This requirement will be satisfied if:

• one of the pumps is an emergency pump of a submersible type having a source of power situated above the bulkhead deck; or
• the pumps and their sources of power are so disposed throughout the length of the ship that, under any conditions of flooding which the ship is required to withstand by Statutory Regulations at least one pump in an undamaged compartment will be available.

8.1.3 The bilge main is to be so arranged that no part is situated nearer the side of the ship than , measured at right angles to the centreline at the level of the deepest load line,

where

8.1.4 Where any bilge pump or its pipe connection to the bilge main is situated outboard of the line , then a non-return valve is to be provided in the pipe connection at the junction with the bilge main. The emergency bilge pump and its connections to the bilge main are to be so arranged that they are situated inboard of the line .

8.2.1 Provision is to be made to prevent the compartment served by any bilge suction pipe being flooded, in the event of the pipe being severed, or otherwise damaged by collision or grounding in any other compartment. For this purpose, where the pipe is at any part situated nearer the side of the ship than or less than 0,5 m above the bottom, a non-return valve is to be fitted to the pipe in the compartment containing the open end.

8.2.2 Open ended pipes and ventilation ducts are to be arranged such that in any condition of flooding water can not enter other watertight compartments:

1. If several compartments are connected by means of open ended pipe lines or ventilation ducts they are to be arranged such that the open ends are situated above the maximum assumed damage condition.

2. Pipelines are not required to comply with (a) above if the pipes/ ventilation ducts are provided with shut off valves capable of being operated from above the bulkhead deck.

3. Pipelines having no open end are to be considered as not damaged if within the extend of damage and the distance from the bottom is more than 0,5 m.

8.3.1 All the distribution boxes, valves and cocks in connection with the bilge pumping arrangements are to be so arranged that, in the event of flooding, one of the bilge pumps may be operative in any compartment.

8.3.2 If there is only one system of pipes common to all pumps, the necessary valves or cocks for controlling the bilge suctions must be capable of being operated from above the bulkhead deck.

8.3.3 Where, in addition to the main bilge pumping system, an emergency bilge pumping system is provided, it is to be independent of the main system and so arranged that a pump is capable of operating on any compartment under flooding conditions; in this case, only the valves and cocks necessary for the operation of the emergency system need to be capable of being operated from above the bulkhead deck.

8.3.4 All valves and cocks mentioned in Pt 5, Ch 11, 8.3 Arrangement and control of bilge valves 8.3.2 and Pt 5, Ch 11, 8.3 Arrangement and control of bilge valves 8.3.3 which can be operated from above the bulkhead deck are to have their controls at their place of operation clearly marked and provided with means to indicate whether they are open or closed.