Singapore's Transport Minister Lui Tuck Yew looks at the vessel traffic information system at the Port Operations Control Centre at Changi Naval Base, Singapore July 25, 2011. Singapore is the world's busiest port by vessel arrival tonnage with more than 127,000 vessels totalling 1.92 billion gross tons calling at its port last year, according to the Maritime and Port Authority of Singapore. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS POLITICS MARITIME TRANSPORT)