According to CNBC, an underwater drone armed with a nuclear warhead is scheduled to join Russia's arsenal no earlier than 2027. CNBC’s claims are based on U.S. intelligence.
Russia is working on a nuclear-powered system, dubbed "Poseidon," which can navigate autonomously, and travel continuously after launching from a submarine.
Russian state media has previously announced that the Russian navy will place at least 30 Poseidon drones on combat duty. The U.S. Navy does not have a similar weapon.