D
Naval ForcesRussia

Delta IV Class (Project BDRM Delfin Class)

Nuclear-powered ballistic missile submarineFielded 1985Pending verification
Naval ForcesRUS
Length 167 m
Identification silhouette. Not drawn to scale between entries.
Fact cardConfidence · Source
System
TypeNuclear-powered ballistic missile submarine
Date of introduction1985
ProliferationOrigin country only
Crew135Med[1]
Hulls delivered8Hulls listed in the source cardMed[1]
Dimensions and weight
Length167 m548 ftMed[1]
Beam12.2 m40 ftMed[1]
Draft8.8 mMed[1]
Displacement (surface)11,740 tonsMed[1]
Displacement (submerged)15,500 tMed[1]
Propulsion and performance
Propulsion2 x VM-4SGMed[1]
Engine power60,000 total shpMed[1]
Operating depth380 mMed[1]
Endurance80 daysMed[1]
Protection
Hull ArmorThese are double-hull submarines, with the forward diving planes mounted on the sail. The diving planes can rotate to vertical for breaking through ice.The submarines have a high freeboardMed[1]
NBC Water Washdown SystemYesMed[1]
EW Intercept1 x MRP-10 Zaliv-P (Brick Pulp) interceptMed[1]
EW Direction Finder1 x Park Lamp** direction-finderMed[1]
Armament
Torpedo System: torpedo tube launcher4 x 533-mm bow tubesMed[1]
Torpedo System: basic load12 x torpedoesMed[1]
Armament16 x SS-N-23 SkiffMed[1]
Fire control
Sensors noteThe submarine has two floating VLF and ELF antenna buoys to receive radio messages, target designation data, and satellite navigation signals while remaining at a safe depth.Med[1]
Surface Search / Navigation Radar1 x MRK-50 Albatros (Snoop Tray) surface search/navigationMed[1]
Active / Passive Sonar1 x MGK-500 series Skat-BDRM (Shark Gill) active/passive low-frequency suiteMed[1]
Active Mine-Avoidance Sonar1 x MGK-519 (Mouse Roar**) active mine-avoidance sonarMed[1]
Towed Passive Array Sonar1 x Pelamida towed passive arrayMed[1]
Caivation Monitor1 x MG-512 cavitation monitorMed[1]
Upward-Looking Echo Sounder1 x MG-518 upward-looking echo sounderMed[1]
Mine-Detection Sonar1 x MG-519 mine-detectionMed[1]
Sound-Velocity Measurement1 x MG533 sound-velocity measurementMed[1]
Ice-Lane Detector1 x NOR-1 active ice-lane detectorMed[1]
Surface Warning Sonar1 x NOK-1 active surface warningMed[1]
Variants
Delta I (Project 667B Murena)No Longer in Service. The Delta-class submarines could deploy on alert patrols in the marginal ice-seas of the Soviet Arctic littoral, including the Norwegian and Barents Seas.[1]
Delta II (Project 667BD Murena-M)No Longer in Service. The Delta II-class submarine was a large ballistic missile submarine designed to remedy shortcomings in the Delta I-class submarine.[1]
Delta III (Project 667BDR Kalmar)Only one vessel on active status. The 667BDR Kal'mar (Squid) Delta III-class submarine is a large ballistic missile submarine. Like the earlier Delta-class submarines the Delta III class is a double-hulled design with a thin, low magnetic steel outer hull…[1]
Delta IV (Project 667BDRM Delfin)Seven Delta IV-class submarines were built; all are still in service in the Russian Navy. The submarines, based at the Sayda Guba Naval Base, operate in the Northern Fleet. The Severodvinsk Shipyard built these vessels between 1981 and 1992.[1]
Delta IV Stretch class/PODMOSKOVYE speciThis DELTA IV-class submarine was modified for special missions. The missile compartment was removed and replaced with a module capable of deploying mini-submarines.[1]
VERKHOTURYE (ex-Russian IMENI XXVI SEZDCommissioned: 1985 Class: Delta IV Class Status: Active Fleet: Northern Fleet[1]
EkaterinburgCommissioned: 1985 Class: Delta IV Class Status: Active Fleet: Northern Fleet[1]
PodmoskovyeCommissioned:1986 Class: Delta IV Class Status: Active Fleet: Northern Fleet[1]
Weapons and payload options · 1Confidence · Source
16 x SS-N-23 SkiffIntercontinental-Range Submarine-Launched Ballistic Missile (SLBM)
Med[1]
Range
8,300 km5,157 mi · 4,482 nmi
Quantity
16 x SS-N-23 Skiff (R-29RM Shtil) Intercontinental-Range Submarine-Launched Ball
Type
Intercontinental-Range Submarine-Launched Ballistic Missile (SLBM)
Guidance
Astroinertial
Warhead
Nuclear
Length
14.9 m
Summary

The Delta IV Class (Project BDRM Delfin Class) Russian Nuclear-Powered Ballistic Missile Submarine. Seven Delta IV-class submarines were built; all are still in service in the Russian Navy.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
Russia
Sources
  1. Delta IV Class (Project BDRM Delfin Class) Russian Nuclear-Powered Ballistic Missile Submarine, U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)
    Published/updated 2026-03-20 · Tier 1 · checked 2026-10-10
Change log
  • 2026-10-10 Entry created from the Worldwide Equipment Guide (ODIN), bulk import