In the event of failure of the inert gas system, action must be taken immediately to prevent air from being drawn into the tanks.
All cargo and/or ballast pump operations must be stopped and the deck isolating valves for the inert gas system closed. Immediate action must be taken to repair the system.
It is essential that the Company be informed immediately of such a failure together with the reason for failure if known, and of any spares are required to repair the system.
Masters are reminded that national and local regulations may require the failure of an inert gas system to be reported to the harbour authority, terminal operator and to the port and flag state administrations.
In crude carriers, due to the possible presence of pyrophoric iron sulphide deposits, such a failure will require either repair to the system or an external supply of inert gas before discharge or tank cleaning can resume.
In the case of product or chemical carriers where a failure cannot be immediately repaired, discharge or tank cleaning may only be resumed if an external supply of inert gas is provided or the following precautions are taken:-
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