The Russian special-purpose nuclear submarine Khabarovsk, designed to carry the Poseidon nuclear-powered giga-torpedo, has set sail from the Sevmash shipyard in Severodvinsk for the first time on August 16, 2026. This submarine is undergoing sea trials in the White Sea. Khabarovsk is the first of a new class of submarines intended to carry autonomous, long-range nuclear Poseidon torpedoes. The design is based on the Borei-class hull but is shorter due to lack of ballistic missile section. The submarine was launched on November 1, 2025, after a lengthy construction period that began in July 2014 and was significantly delayed from the initially intended 2020 service entry. It reportedly carries six Poseidon torpedoes, which are 24 meters long with a range of 10,000 kilometers and can operate at depths up to 1,000 meters, making interception difficult. Khabarovsk will be transferred to the Pacific Fleet, where facilities for Poseidon weapons are under construction. The submarine and Poseidon system represent a strategic second-strike nuclear capability labeled as a doomsday weapon. Putin claimed a successful Poseidon test in October 2025. A second submarine of the class, Orenburg, is under construction with unknown launch date, and the status of a third vessel is unclear. Russian state media and Sevmash have not officially confirmed the voyage; information was first reported by Russian military blogs and The Barents Observer.

The Russian special-purpose nuclear submarine Khabarovsk, designed to carry the Poseidon nuclear-powered giga-torpedo, has set sail from the Sevmash shipyard in Severodvinsk for the first time on August 16, 2026. This submarine is undergoing sea trials in the White Sea. Khabarovsk is the first of a new class of submarines intended to carry autonomous, long-range nuclear Poseidon torpedoes. The design is based on the Borei-class hull but is shorter due to lack of ballistic missile section. The submarine was launched on November 1, 2025, after a lengthy construction period that began in July 2014 and was significantly delayed from the initially intended 2020 service entry. It reportedly carries six Poseidon torpedoes, which are 24 meters long with a range of 10,000 kilometers and can operate at depths up to 1,000 meters, making interception difficult. Khabarovsk will be transferred to the Pacific Fleet, where facilities for Poseidon weapons are under construction. The submarine and Poseidon system represent a strategic second-strike nuclear capability labeled as a doomsday weapon. Putin claimed a successful Poseidon test in October 2025. A second submarine of the class, Orenburg, is under construction with unknown launch date, and the status of a third vessel is unclear. Russian state media and Sevmash have not officially confirmed the voyage; information was first reported by Russian military blogs and The Barents Observer.