A growing number of reports suggest that Russian-flagged cargo vessels traveling between Iran and Russia have been “going dark” at sea—deliberately switching off their tracking systems—fueling concerns about covert weapons transfers.

Maritime analysts and intelligence sources say this tactic, known as disabling AIS (Automatic Identification System), is commonly used to conceal sensitive cargo movements. Evidence shows that several ships operating in the Caspian Sea have disappeared from tracking systems while approaching Iranian ports such as Amirabad, only to reappear later in Russian ports like Astrakhan.

Satellite imagery and defense reports have previously linked some of these vessels to the transport of military equipment, including drones and ballistic missiles. One such ship was reportedly seen moving cargo from Iran to Russia in 2024, highlighting deepening military cooperation between the two countries.

Further complicating the picture, Ukrainian officials have claimed strikes on Russian ships suspected of carrying Iranian weapons, underscoring how these maritime routes have become part of a broader geopolitical conflict.

Experts warn that the use of “dark shipping” not only undermines international monitoring systems but also increases the risk of escalation. Without transparency, it becomes nearly impossible to verify cargo contents—raising fears of unchecked arms flows and potential violations of sanctions.

While Moscow and Tehran have not publicly confirmed such covert transfers, the pattern of disappearing vessels and reappearing along known ռազմական logistics routes continues to draw scrutiny from Western intelligence and maritime watchdogs.