Section 3 - Cargo unloading procedures and tank stripping
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Conventions - MARPOL - International Convention for the Prevention of Pollution from Ships - Annex II of MARPOL 73/78Regulations for the Control of Pollution by Noxious Liquid Substances in Bulk - Appendix 4 - Standard Format for the Procedures and Arrangements Manual - Section 3 - Cargo unloading procedures and tank stripping

Section 3 - Cargo unloading procedures and tank stripping

  3.1 This section contains operational procedures in respect of cargo unloading and tank stripping which must be followed in order to ensure compliance with the requirements of Annex II.

  3.2 Cargo unloading

This section shall contain procedures to be followed including the pump and cargo unloading and suction line to be used for each tank. Alternative methods may be given.

The method of operation of the pump or pumps and the sequence of operation of all valves shall be given.

The basic requirement is to unload the cargo to the maximum extent.

  3.3 Cargo tank stripping

This section shall contain procedures to be followed during the stripping of each cargo tank.

The procedures shall include the following:

  • .1 operation of stripping system;

  • .2 list and trim requirements;

  • .3 line draining and stripping or blowing arrangements if applicable; and

  • .4 duration of the stripping time of the water test.

  3.4 Cargo temperature

This section shall contain information on the heating requirements of cargoes which have been identified as being required to be at a certain minimum temperature during unloading.

Information shall be given on control of the heating system and the method of temperature measurement.

  3.5 Procedures to be followed when a cargo tank cannot be unloaded in accordance with the required procedures

This section shall contain information on the procedures to be followed in the event that the requirements contained in sections 3.3 and/or 3.4 cannot be met due to circumstances such as the following:

  • .1 failure of cargo tank stripping system; and

  • .2 failure of cargo tank heating system.

  3.6 Cargo Record Book

The Cargo Record Book shall be completed in the appropriate places on completion of any cargo operation.

Parent topic: Appendix 4 - Standard Format for the Procedures and Arrangements Manual
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