Russian Navy’s Kharabovsk Special Purpose Submarine Hits the Water
Satellite images observed by Naval News show the Russian Navy special purpose submarine RFS Khabarovsk in the water, moored at a quay at the Sevmash shipyard in Severodvinsk. While the ceremonial launch took place on November 1st, the submarine actually entered the water around November 30, 2025.
Previously, the submarine was observed located at the slipway outside factory hall number 1 where it was rolled out on November 1st, following a construction period that lasted a decade. The rolling out ceremony was attended by several high ranking profiles including the Russian Defence Minister Andrey Belousov; the Commander of the Russian Navy Admiraal Alexander Moiseyev, the Director-General of the United Shipbuilding Cooperation Andrey Puchkov and the director of the Sevmash shipyard Mikhail Budnichenko.
The submarine is classified as a special purpose submarine designed and build to launch the nuclear powered ‘Poseidon’ torpedo’s and is currently only one of two submarines capable of launching such torpedo’s with the other submarine being the special purpose submarine RFS Belgorod. Russia previously announced that it has tested these torpedo’s near the Novaya Zemlya Archipelago, reporting that these torpedo’s functioned as intended.
During the roll-out, the propulsion unit of the submarine was covered in sails to prevent direct observation and ensure secrecy. Though the submarine was rolled out of the construction hall on November 1st, the submarine spend several weeks outside on the slipway before finally being placed in the water. During this time, construction was still ongoing with satellite images showing a shed placed on top of the aft hatch, directly aft the sail, and sails covering the bow to prevent observation of the outer torpedo doors.
Special purpose submarine Khabarovsk
The submarine was designed by the Rubin design bureau and appears to be based on the design of a Borei-A class nuclear ballistic missile submarine. Unlike conventional Russian nuclear submarines, the Khabarovsk is described by Russian sources as a special purpose submarine and can’t be classified as a nuclear attack submarine or a ballistic missile submarine. Instead, the Khabarovsk is designed and build to execute a very specific task, namely launch Status-6 ‘Poseidon’ nuclear torpedo’s.
These torpedo’s are nuclear powered, giving them in theory unlimited range, and are capable of carrying a nuclear warhead of up to two megaton. This weapon is a strategic asset for Russia, allowing it to be fired safely from Russian bastion areas and travel to enemy coastal regions. These torpedo’s are primarily to be used to strike coastal facilities such as important harbours and naval bases, rather then to be used to attack fleet formation on the high seas.
Given their nuclear capabilities in both propulsion and payload, the Status-6 ‘Poseidon’ torpedo is significantly larger then a regular torpedo, measuring 20 meters in length and 2 meters in diameter, meaning that no regular submarine is able to store and launch these weapons.
Khabarovsk is specifically designed to carry and launch several of these torpedo’s and as such, as an unique torpedo room to store and launch the Status-6 ‘Poseidon’ torpedo. It is believed that the submarine can hold up to six of these nuclear torpedo’s.
The Rubin design bureau appears to have based the Khabarovsk on the Borei-A class nuclear submarines, opting to remove the aft compartments that houses the ballistic nuclear missiles and redesign the front section to house the unique oversized torpedo room. Observation of satellite imagery shows that the Khabarovsk comes in to around 136 meters in length, roughly 20 meters shorter then a regular Borei-A class submarine.
By basing the design of the Khabarovsk on the Borei-A class, the Russian Navy opted to take a pragmatic approach. This choice allowed Russia to speed up construction of the Khabarovsk as the Sevmash shipyard could make use of the skilled workforce and supply of parts that were already in use for building the series of Borei-A class ballistic missile submarines for the Northern and Pacific Fleets.
Russia might be working on a third submarine capable of launching the Status-6 ‘Poseidon’ torpedo. This submarine, identified as the Ulyanovsk was laid down in 2017 and is allegedly based on the Yasen-M class.Russia might be working on a third submarine capable of launching the Status-6 ‘Poseidon’ torpedo. This submarine, identified as the Ulyanovsk was laid down in 2017 and is allegedly based on the Yasen-M class.
Strategic implications for the West
Cutaway illustration of Poseidon, based on analysis of images released by Russia. The nuclear reactor heats water to steam which then drives a steam turbine. This is similar to nuclear submarines.
The Khabarovsk and her weapon systems are clearly strategic assets meant to complement the current nuclear deterrent of the Russian Navy. Since the Status-6 ‘Poseidon’ torpedo is nuclear powered, these weapons can be launched from safe zones near the Russian coast, so called Bastion areas, where the submarine is protected by its fleet and land based assets. Once launched, the torpedo can in theory strike any coastal target in the world. So far, there is no report on how these torpedo’s can be countered which means that Russia has a strategic advantage by fielding these weapons in active service.
It is unknown where Khabarovsk will be based. In 2023, TASS reported that both the Khabarovsk as the Belgorod would be deployed in the Pacific Fleet with special facilities being constructed at Kamchatka. No additional news regarding these construction works were later reported, suggesting that these plans were shelved due, probably due to financial reasons as Russia is getting more hard pressed in financing its war against Ukraine.
Basing these two submarines in the Pacific Ocean would also make little sense given the fact that Russia’s main adversary is NATO and as such favours an Atlantic Ocean first approach. Basing both submarines in the Northern Fleet allows Russia to strike targets in Western Europe and the US eastern seaboard where most of its important harbours are located. It would also allow both submarines to benefit from operating in the Barents Sea where Russia recently installed its Harmony array, providing additional security and freedom of operations for its submarine force.
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