

On April 6, 1993, submarine 664 received the name Belgorod after the Russian city with that name and the tactical designation K-139. The submarine's construction was originally laid down on Jat the Severodvinsk Shipyard as pennant number 664 of the Oscar II class cruise missile submarines. The Belgorod will reportedly be the first submarine to utilize the Status-6 Oceanic Multipurpose System.

The submarine was delivered to the Russian Navy on 8 July 2022. It tested at sea in 1H2022 and was commissioned by the Russian Navy in July 2022. The K-329 Belgorod, along with the Status-6 Oceanic Multipurpose System, was one of the last weapons systems presented by Russian President Vladimir Putin during his annual speech on March 1, 2018. Due to chronic underfunding, its construction was suspended then resumed at a low rate of progress before the ship was redesigned to become a unique vessel - the first Russian fifth-generation submarine, according to the Ministry of Defence. It was originally laid down in July 1992 as a Project 949A cruise missile submarine ( NATO designation Oscar II class), but later was redesigned and the partly built hull was reconfigured as a special operations vessel, able to operate unmanned underwater vehicles. K-329 Belgorod ( Russian: БС-329 «Белгород») is a modified design of the Oscar II class ( NATO designation) Russian nuclear submarine. Unmanned underwater vehicle submarine mothership, Status-6 Oceanic Multipurpose System platform Ģ pressurized water reactor OK-650M.02 nuclear reactors, 2 × steam turbines delivering 190 MW (250,000 shp) to two shaftsĥ00 to 520 m (1,640 to 1,710 ft) by various estimates
