Iran, Russia and China conduct live anti-ship missile drills in Gulf of Oman with submarines and drones within range of US carriers

Iran, Russia and China have carried out live anti-ship missile drills in the Gulf of Oman, using submarines, surface vessels and drones in waters that overlap key routes for United States carrier groups. The exercise brought advanced weapons and surveillance platforms into a confined maritime corridor where American and allied warships regularly operate.

The drills took place as Washington expanded its own missile defenses and naval presence around the Gulf, creating a dense, heavily armed environment for commercial shipping and military traffic alike.

What happened

The latest joint exercise brought together Iranian, Russian and Chinese naval forces in the Gulf of Oman, a choke point that connects the Arabian Sea to the Strait of Hormuz and the wider Gulf. According to regional reporting, the drills featured coordinated launches of anti-ship missiles from surface combatants, along with supporting fire from coastal batteries positioned along Iran’s shoreline. Submarines and unmanned aerial vehicles were integrated into the scenario to track and target simulated enemy vessels.

Iranian commanders presented the exercise as a demonstration of layered maritime strike capability. Surface ships provided visible deterrence, while submarines and drones supplied quieter tracking and targeting data. The use of multiple platforms in a single firing sequence suggested an effort to practice real-world engagement tactics against large surface groups, including carrier strike formations that periodically transit the area.

The Gulf of Oman setting was significant. These waters sit directly on the approach to the Strait of Hormuz, through which a large share of the world’s seaborne crude and refined products passes. United States Navy carrier groups, destroyers and logistics ships frequently move through the same sea lanes on their way to and from operations in the Gulf and the Arabian Sea. By staging live anti-ship missile shots in this corridor, the three navies placed their weapons within realistic range envelopes for any major surface force entering or leaving the region.

The exercise unfolded against a backdrop of increased American deployments. The United States has been reinforcing air and missile defenses around the Gulf, including additional Patriot and other systems to protect bases and partners. Naval assets have also been repositioned to counter threats from Iran and its allies to shipping and regional infrastructure. Analysts describe this environment as a crowded battlespace in which more missiles, more sensors and more armed patrols coexist with dense commercial traffic, a pattern highlighted in assessments of the Gulf shipping risks.

For Iran, the presence of Russian and Chinese vessels provided political backing as well as additional hardware. Russian ships contributed blue-water experience and long-range sensors, while Chinese participation signaled Beijing’s interest in securing sea lanes that carry energy supplies to Asia. The combined flotilla rehearsed search patterns, electronic warfare support and coordinated firing sequences, according to regional defense observers.

Why it matters

Joint anti-ship drills in the Gulf of Oman matter for three intertwined reasons: deterrence messaging to the United States, direct implications for commercial shipping, and the broader alignment among Iran, Russia and China.

To start, the exercise served as a visible challenge to American naval dominance in waters that have long been treated as a core operating area for United States carrier strike groups. Practicing live anti-ship missile engagements within realistic range of those routes signals that any future crisis could see U.S. warships face coordinated salvos from multiple directions. The involvement of submarines and drones indicates a focus on saturating defenses with complex, multi-axis threats rather than simple single-platform attacks.

The drills also add to the risk profile for commercial shipping. Tankers and container ships already navigate a region where Iranian forces have previously seized or harassed foreign-flagged vessels, and where mines, drones and missiles have been used in attacks on merchant traffic. Layering live-fire missile exercises on top of a growing American missile footprint increases the chance of miscalculation, misidentification or technical malfunction. A missile that fails in flight or a radar operator who misreads a track could have immediate consequences for an unarmed tanker in a narrow sea lane.

Insurance markets and shipping companies track these developments closely. Higher perceived risk can translate into increased war-risk premiums, route diversions around the Cape of Good Hope, or demands for naval escorts. Each of those responses carries a cost that ultimately filters into global energy and goods prices. The more frequently Iran, Russia and China conduct complex live-fire drills in this corridor, the more shipowners and charterers must factor that activity into their commercial decisions.

The drills are also a concrete expression of a growing strategic alignment. Iran gains from the presence of two permanent members of the United Nations Security Council in its near seas, which complicates any Western planning for coercive measures or strikes against Iranian territory. Russia and China, in turn, secure a partner that sits astride one of the world’s most important maritime chokepoints. Joint exercises help these three militaries learn each other’s procedures, communications habits and capabilities, which could matter in any future confrontation that spills across regions.

For Washington and its partners, this alignment forces a recalibration of deterrence and crisis management. Any incident involving Iranian forces in the Gulf of Oman now carries the potential for diplomatic involvement from Moscow and Beijing, and possibly for their naval assets to be present in the vicinity. That does not mean automatic escalation, but it narrows the margin for unilateral action and increases the need for clear communication channels.

There is also a technological dimension. Observers watch closely for signs that Russia or China might share advanced anti-ship missile designs, targeting software or electronic warfare techniques with Iran. Even incremental improvements in Iranian missile accuracy, seeker performance or launch platform survivability would alter the balance of risk for U.S. and allied ships operating near the Strait of Hormuz.

What to watch next

Several indicators will show whether these drills mark a one-off signal or a sustained shift in the maritime balance around the Gulf of Oman.

One is the frequency and scale of future joint exercises. If Iran, Russia and China repeat live-fire anti-ship drills on a regular schedule, with more ships or more advanced missiles each time, that would suggest an intent to normalize their presence and steadily refine their ability to operate together. Increased participation by specialized assets such as long-range maritime patrol aircraft or advanced submarines would be another sign of deepening cooperation.

Another is any change in Iranian behavior toward commercial shipping. A pattern of more aggressive boardings, seizures or close approaches in the wake of the drills would indicate that Tehran feels emboldened by its partnerships. Conversely, a period of restraint paired with more structured military exercises could signal a strategy that uses visible capability as leverage in negotiations while avoiding direct confrontation at sea.

Regional and American responses will also matter. Gulf states may seek additional missile defense systems, maritime patrol aircraft or intelligence sharing arrangements to track both Iranian and partner navies. The United States could adjust carrier deployment patterns, rely more heavily on submarines and long-range airpower, or expand joint drills with partners that emphasize convoy protection and integrated air and missile defense.

Diplomatic activity bears close watching as well. Any new security understandings between Iran and Russia or China, whether formal agreements or practical arrangements for logistics and basing, would anchor the naval cooperation in a broader framework. On the other side, steps by Washington to open or expand deconfliction channels with Moscow and Beijing for Gulf waters could help manage the risk of unintended clashes.

Technology transfers are another key variable. Evidence that Iran is fielding new anti-ship missiles that resemble Russian or Chinese designs, or that its drones and targeting systems have gained range and precision, would suggest that the drills are accompanied by deeper military-technical cooperation. Satellite imagery of new coastal missile batteries, upgraded radar sites or expanded naval facilities along Iran’s Gulf of Oman coast would reinforce that assessment.