In Asia-Pacific, the real maritime contest is over satellite surveillance

Control of the seas has long defined power in the Asia-Pacific. From strategic chokepoints to contested fishing grounds, maritime space has shaped the region’s economic lifelines and geopolitical tensions. But a quieter contest is unfolding – less visible, yet potentially more consequential.It is not a contest over territory but over data. As satellite surveillance, digital tracking and advanced analytics transform how the ocean is monitored, a new question emerges: who controls the information that defines maritime reality?While legal frameworks such as the UN Convention on the Law of the Sea (Unclos) govern maritime zones, they do not address a critical dimension of contemporary power – control over maritime data infrastructure.In practice, this gap is increasingly significant. Across the Asia-Pacific, states are investing in technologies that let them observe maritime activity in near real time. Vessel movements can be tracked, behavioural patterns analysed and anomalies detected long before any patrol vessel is deployed. The ocean is no longer an opaque space; it is an increasingly mapped and monitored domain.Yet this visibility is not evenly distributed. A small number of technologically advanced actors – states and private companies – dominate the infrastructure. Satellite constellations, data platforms and analytical tools are concentrated in the hands of those with the capacity to build and maintain them. For many coastal states, especially in Southeast Asia and the Pacific, access to maritime awareness depends on external systems. This creates a layer of geopolitical dependency.While Unclos grants coastal states sovereign rights over their exclusive economic zones, the ability to exercise those rights is increasingly mediated by access to data. A distinction is emerging between legal sovereignty and informational sovereignty. States may control their waters in law, but not fully control the information that reveals what happens within them.09:23History, money and military: why the South China Sea is so important to BeijingHistory, money and military: why the South China Sea is so important to Beijing