On 20 February 2019, the Russian Defence Ministry released a video, showing a Poseidon being test-launched by a B-90 Sarov special purpose submarine. On 2 February 2019, Russian President Vladimir Putin announced completion of the key stage of trials of Poseidon. In January 2019, the Russian Navy announced plans to procure at least 30 Poseidon unmanned underwater vehicles, deployed on four submarines, two of which would serve in the Russian Northern Fleet and two in the Pacific Fleet.

In March 2018, the system was officially named 'Poseidon', following a public vote. In early 2018, the Pentagon's Nuclear Posture Review publicly acknowledged development of Russia's 'new intercontinental, nuclear armed, nuclear-powered, undersea autonomous torpedo'.

The test was reportedly carried out in the Arctic Ocean. Īccording to the Pentagon, Russia conducted the first test-launch of Poseidon on 27 November 2016, using the B-90 Sarov special purpose submarine. The CIA has concluded the leak was intentional. Speculation arose as to whether this was a warning signal or disinformation intended to mislead foreign intelligence services. The leak happened during Russian President Vladimir Putin's speech denouncing American plans concerning defensive missile technology. On 10 November 2015, a page of a document that contained information about a secret 'oceanic multi-purpose system' called 'Status-6' was 'accidentally' revealed by Russian NTV television channel. The first public appearance of Poseidon dates back to September 2015 and cites Pentagon sources.

Terminated status 6 astrometry