OVERVIEW: The PLARB-667BDRM Delta IV [Delfin] is a nuclear-powered ballistic missile submarine (SSBN) of the Delta IV class, operated by the Soviet Union. Commissioned in 1982, it represents a significant evolution of the Soviet Union's strategic nuclear deterrent at sea.

DETAILS:
The Delta IV class, designated Project 667BDRM, was developed as a successor to the Delta III class, addressing shortcomings in missile range and noise reduction. Design improvements focused on enhanced stealth characteristics, including improved hull insulation and acoustic isolation of machinery, making it significantly quieter than its predecessors. The boat was also designed with improved combat survivability in mind, featuring a more robust hull structure capable of withstanding underwater explosions and enhanced countermeasures against anti-submarine warfare (ASW) assets. The project was a direct response to improvements in US ASW capabilities and the need to maintain a credible second-strike capability.

The primary role of the PLARB-667BDRM Delta IV is to serve as a strategic nuclear deterrent, capable of delivering nuclear warheads to targets across the globe. Its operational profile involves extended periods of submerged patrol, typically in Arctic regions, where the ice cover provides a degree of protection from detection. While primarily a strategic asset, the vessel also possesses limited self-defense capabilities against submarines and surface combatants. The installation of 533mm torpedo tubes allows for engagement of underwater threats, while the 'Signal Ejector' acts as a decoy system, enhancing the submarine's survivability in a hostile environment.

The vessel is equipped with an array of sensors designed to maximize its situational awareness. The Shark Gill [MGK-520 Skat-BDRM] sonar suite provides comprehensive active and passive sonar capabilities for detecting and tracking both surface and subsurface contacts. The Shark Tail [Pelmida] towed array sonar further enhances passive listening capabilities, particularly at low frequencies, improving detection ranges. The Brick Pulp [MRP-21 Zaliv-P] radar is likely employed for navigation and surface search. The installation of the Snoop Tray 2 [MRK-50 Kaskad] ESM suite allows for the detection and analysis of radar emissions, providing warning of potential threats. Acoustic Intercept provides the capability to geolocate and classify surface vessels based on their unique acoustic signature. Mouse Roar [MG-519 Arfa-M] provides sonar countermeasures. Finally, optical and LLTV periscopes provide visual situational awareness.

SPECIFICATION: Length: 166.0 m || Beam: 12.3 m || Draft: 8.8 m || Disp: 13500 t

SENSORS: Shark Gill [MGK-520 Skat-BDRM] || Shark Tail [Pelmida] || Park Lamp || Brick Pulp [MRP-21 Zaliv-P] || Snoop Tray 2 [MRK-50 Kaskad] || Generic Acoustic Intercept || Mouse Roar [MG-519 Arfa-M] || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: SS-N-18 Stingray Mod 1 SLBM || 533mm TT || 533mm TT || Signal Ejector