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Foreign observers of China's growing naval prowess might be worried by what they've seen in recent years. Around a hundred new warships have come off the country's slipways since 2001, while another dozen are under construction. Chinese ships are, on average, getting bigger and more powerful as well as more numerous as Beijing builds what is shaping up to be the world's biggest submarine fleet, as well as new types of anti-ship missiles and the nation's first aircraft carriers. One older Russian carrier is being refurbished and US analysts expect the first fully home-built Chinese carrier to enter service by 2015, with the possibility of more to follow.

All this is a far cry from the People's Liberation Army Navy's status even a decade ago as a coastal weakling, and has come at...