TEHRAN – Russia is reportedly helping Iran acquire advanced supersonic cruise missile technology, and it poses fresh challenge to US warships in the region.
A report by Financial Times said the secretive programme has been underway since 2023 despite rising tensions between Iran, the US and Israel. It said Moscow has been providing Iran with technical assistance to develop supersonic cruise missiles since 2023, in what experts describe as a potentially significant expansion of defence cooperation between Moscow and Tehran.
Work on secretive and long-term missile programme, reportedly known as “C-430L,” continued despite escalating tensions and military confrontation involving Iran, the United States and Israel. Experts consider Russia’s alleged transfer of technology that could enable Iran to independently produce advanced supersonic missiles to be among the most significant defence cooperation initiatives between the two countries.
The report said the missiles under development are designed to travel at several times the speed of sound and could potentially fly extremely close to the surface of land or sea. Experts say the combination of high speed and low-altitude flight could make such missiles more difficult for radar systems to detect in time and for air-defence systems to intercept.
Russia’s key role in the programme has reportedly involved helping Iran develop a ramjet engine or propulsion system. Unlike conventional jet engines, ramjets use oxygen from the surrounding air to support combustion. The technology is suited to high-speed flight and can also allow missile designers to allocate internal space more efficiently for fuel and other payload requirements, the report said.
The report claims that Tehran already successfully tested the system, although there is no conclusive evidence so far that the complete missile has been produced or formally deployed by the Iranian military. It said leading Russian aerospace companies and missile specialists have worked directly with Iranian officials on the programme. Russian engineers are also said to have made multiple visits to Iran and examined data collected from Iranian flight tests.
According to the report, Russian specialists provided Iranian teams with technical guidance during 2025 on areas including fuel systems, air intake and engine performance. The reported assistance suggests that the cooperation has extended beyond preliminary designs and technical documentation to practical engineering support and analysis of test data.
Fabian Hinz, an Iranian missile expert at Conflict Armament Research, described the alleged technology transfer as highly sensitive and strategically important. Hinz said Iran had sought access to this type of military technology for decades and suggested that approval for such a major programme would likely have required authorization from Russia’s highest political leadership.
The technology could provide Iran with an advanced strategic weapon capable of posing a significant threat to US naval fleets and warships operating in the region. The report comes as international attention remains focused on growing defence and technological cooperation between Iran and Russia.
However, despite the claims detailed in the report, the full production and operational deployment of the missile have yet to be independently confirmed.
