Hong Kong shipping interests have lobbied the city-state’s maritime authorities for years to raise the air draft restriction on the Tsing Ma Bridge, the mile-long span over Ma Wan Channel. Regulators say that the bridge deck is about 203 feet above the water, but marine traffic is restricted to a height of 174 feet, limiting the size of the container vessels that can call Hong Kong. Today’s 18,000 TEU ships typically need about 190 feet of clearance, and with a huge safety margin in place, it isn’t legal to bring them under the bridge – even with special permission.
The height error alone would be more than enough to accommodate the extra air draft required by ULCVs. However, the SCMP reports that despite the new report, Hong Kong’s Marine Department has not yet moved to re-survey the bridge and update its navigational requirements. “The Marine Department is responsible for the accuracy of the information on local charts and it is clearly incorrect,” said Martin Cresswell, technical director of the Hong Kong Shipowners Association.
While the news is frustrating to the many ship operators who are not allowed to use larger vessels in Hong Kong, it is also an opportunity: any port would be delighted to find that its old harbor bridge is actually tall enough for modern ships. Bridge spans can take a decade and billions of dollars to replace, but regulations can be rewritten at relatively low cost (with enough political will).