Executive Summary
From 1 to 5 August 2025, the Russian Pacific Fleet and the People’s Liberation Army Navy (PLAN) are conducting a bilateral naval exercise entitled Maritime Interaction – 2025 in the Sea of Japan/East Sea.
The naval exercise includes surface warships, diesel submarines, and aircraft from the navy. Joint operations involve activities like anti-submarine warfare (ASW), air defence exercises, search and rescue missions, and live-fire artillery drills.
Despite being declared defensive, Maritime Interaction – 2025 still carries strategic signalling value. It aims to show cooperation despite current geopolitical tensions with the United States and its allies in the area.
Key Takeaways
- Russia and China are strengthening their partnership by showing off joint naval exercises in the Western Pacific.
- Structural and doctrinal differences continue to limit the operational depth of their military partnership.
- The naval exercise serves more as a geopolitical signal in the strategic area of the Asia-Pacific.
Background Information
From August 1 to August 5, 2025, the Russian Ministry of Defence’s Pacific Fleet and the Chinese Navy conducted Maritime Interaction – 2025, a joint exercise in the Sea of Japan/East Sea, with coordination and command functions based in Vladivostok.
The Udaloy-class destroyer Admiral Tributs is the flagship of the Russian flotilla; the Chinese Navy has employed the Type 052D destroyer Shaoxing. Additional participating assets include diesel-electric submarines and maritime aviation units from both countries.
According to official statements, the exercise covers several mission sets: submarine hunting, air defence operations, Maritime Search and Rescue, and live-fire artillery drills. Both parties declared the operation targets no third states and is defensive.
This event is part of a recurring series of bilateral naval drills dating back to 2012, though recent editions have acquired greater strategic weight considering global security realignments.
Geopolitical Scenario
The Asia-Pacific continues to be a key area of strategic rivalry, as the United States strengthens its security structure using alliances and forward deployments to offset China’s maritime assertiveness. Moscow’s increasing alignment with Beijing in this area poses a challenge to Western influence, although it is driven more by opportunism than by fully aligned strategic goals.
Maritime Interaction – 2025 reflects Moscow and Beijing’s intention to display operational compatibility and mutual resolve in resisting perceived US-led containment strategies in the Asia-Pacific region. The naval drills offer a venue for both parties to align command structures, improve naval operations, and boost public awareness of converging strategies.
However, significant structural constraints limit the practical depth of the partnership. Russia focuses its naval power on the Arctic and Europe, leaving its Pacific Fleet as a secondary force. China’s naval ambitions, unlike Russia’s, aim for sea control and blue-water capabilities in the Western Pacific and other areas.
Historically rooted mistrust remains unresolved. Demographic imbalances and economic differences have heightened Moscow’s strategic worries about the Russian Far East, especially its regions next to northeastern China. Even though joint exercises simulate tactical interoperability, the two states lack a formal alliance structure, and their perceptions of threats are similar but not the same.
Implications
- The United States and its regional allies (mainly Japan and Australia) might interpret the Maritime Interaction – 2025 as a symbolic act of strategic convergence between Russia and China.
- The naval exercise can represent the beginning of more frequent naval coordination in sensitive maritime theatres, particularly around Japan and Taiwan.
- Operational learning from the exercise could marginally enhance Russian naval proficiency in ASW and air defence, areas where PLAN experience is growing.
- The joint activity risks reinforcing threat perceptions in the Asia-Pacific, prompting further regional defence alignment with the United States.
- Frictions may emerge if future exercises expand in scope or proximity to disputed maritime boundaries or increase intelligence-gathering activities.
Conclusion
The Maritime Interaction – 2025 exercise shows an ongoing pattern of military coordination between Russia and China. Although the operation helps improve the image of both countries and strengthens the idea of multipolar resistance, differing priorities and unequal abilities still limit it.
Peacetime drills will test the credibility of this cooperation over time, but real crises involving Taiwan, the Korean Peninsula, or the Arctic will truly put it to the test. Without established alliances and given the history of mutual suspicion, unified military action is unlikely to occur during such events.
