Orders won by South Korean shipbuilders increased nearly twofold in 2013 from the previous year, beating their Chinese rivals in terms of value, data showed Friday. According to the data compiled by market researcher Clarkson Research Services, South Korean shipyards reaped orders of 16.07 million compensated gross tons (CGTs) last year, up 99 percent from 8.08 million CGTs in 2012. The figure is 33 percent of overall global vessel orders of 48.66 CGTs placed last year. The global orders were up 92.4 percent from a year ago.