Manifold Recommendations for Liquefied Gas Carriers, 2011

Owing to the nature of their construction, certain types and sizes of liquefied gas carriers may be unable to comply with all the requirements of these recommendations. Where possible, the differences between ship design and these recommendations should be minimised.
Notwithstanding the progress that has been made since 1979 to improve conformity in manifold arrangements, it is recognised that many existing ships and terminals are unable to follow these recommendations. Owners and operators of such ships and terminals should appreciate that this may lead to operational restrictions and they should be prepared to discuss these differences before a ship is programmed to any berth for the first time. It is not suggested nor implied that ships constructed before publication of this document should be altered.
Although Ship to Ship (STS) transfer operations are carried out on a regular basis with LPG, LNG STS is a relatively recent development. Considerations are made within this document to take into account the industry movement towards LNG STS and also to review past experience with LPG STS.