The giant containerships, which act as a floating conveyor-belt for international trade, are struggling to maintain volumes in the face of global slow down, shipping analysts said. "The continued recession environment will act as a plague on the markets," said a recent report by the New York-based Commonwealth Group. Analysts said it was the container carrying behemoths on the trans-Pacific trades that had started to suffer first, largely because of U.S. slow down. Many can load over 6,000 truck-sized units at once, packed with anything from refrigerated fruit and shellfish through to televisions and cars. "My impression is the transPacific…