The start of Chinese patrols in the pirate-infested Gulf of Aden is intended to extend China's naval role and presence far from its shores while demonstrating, under United Nations rules of engagement, a capability to conduct complex operations in distant waters.

Today, taking on pirates under the placard of internationalism offers China a welcome opportunity to add force to its global power ambitions. The antipiracy plank earlier made it handy for Beijing to agree to joint patrols with Pakistan in the Arabian Sea and extend cooperation to ASEAN. Another Chinese objective is to chip away at India's maritime dominance in the Indian Ocean — a theater critical to fashioning a Sino-centric Asia. If China can assert naval power in the Indian Ocean to expand its influence over the regional waterways and states, it will emerge as the preeminent Asian power.

The geopolitical importance of the Indian Ocean today is beginning to rival that of the Pacific. Much of the global oil-export supply passes through the Indian Ocean rim region, particularly through two constricted passageways — the Strait of Hormuz between Iran and Oman, and the piracy-plagued Strait of Malacca.