5.2 Discharge of water ballast
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Specifications and Manuals - Inert Gas Systems - 5 Application to Cargo Tank Operation - 5.2 Discharge of water ballast

5.2 Discharge of water ballast

  5.2.1 Before discharge of cargo tank ballast is undertaken, the following conditions should be checked:

  • .1 All cargo tanks are connected up to the inert gas system and all isolating valves in the deck pipework are locked open.

  • .2 All other cargo tank openings are shut.

  • .3 All valves isolating the mast risers from the inert gas system are shut.

  • .4 The arrangements required by regulation 62.13.4.1 are used to isolate the cargo main from the inert gas main.

  • .5 The inert gas plant is producing gas of an acceptable quality.

  • .6 The deck isolating valve is open.

  5.2.2 During the deballasting operation, the oxygen content of the gas and its pressure in the inert gas main should be continuously recorded (see regulation 62.16.1.1 and .2).


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