The robust body is made of high quality alloy steel with σт = 1 GPa (10,000 kgf / cm2).

To simplify the installation of equipment, the boat was designed using zonal blocks, which made it possible to transfer a significant amount of work from the cramped conditions of the sub's compartments directly to the workshop.

After completion of the installation, the zonal unit is “rolled” into the hull of the boat and connected to the main cables and pipelines of the ship's systems.

[7][6] The boat has a developed vertical tail unit with a streamlined boule, in which the towed antenna is located.

[10] From 1998 to 2002, at FSUE PO Sevmashpredpriyatie an emergency and recovery repair of a steam turbine unit was carried out.

On 11 January 2021, according to TASS, citing sources in the military–industrial complex, repair work and restoration of the technical readiness of the Tigr nuclear submarine is planned to be completed in 2022.