Delta class submarine
Encyclopedia
The Delta class is a class of submarines which formed the backbone of the Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 and Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n strategic submarine fleet since its introduction in 1973. They carry nuclear ballistic missiles of the R-29 Vysota
R-29 Vysota
R-29 Vysota is a family of Russian submarine-launched ballistic missiles, designed by State Rocket Center Makayev. Development of the R-29 SLBMs started in the 1963 and was first launched in 1969. It uses the storable Liquid rocket propellants N2O4/UDMH. Over time different versions have developed...

 family, with the Delta I, II, III and IV carrying the R-29 (NATO reporting name
NATO reporting name
NATO reporting names are classified code names for military equipment of the Eastern Bloc...

: SS-N-8 'Sawfly'), R-29D (SS-N-8 'Sawfly'), R-29R (SS-N-18 'Stingray') and R-29RM (SS-N-23 'Skiff') respectively. The Delta I carried 12 missiles, the Delta II was a "stretched" Delta I that could carry 16 missiles; the Delta III and IV carry 16 missiles with multiple warheads and the submarines have improved electronics and noise reduction.

The R-27 Zyb missile carried by the Project 667
Yankee class submarine
The Yankee class is the NATO classification for a type of nuclear-powered submarine that was constructed by the Soviet Union from 1968 onward. 34 units were produced under Project 667A Navaga and Project 667AU Nalim...

s of the late 1960s had a range of just 2500–3000 km (1,553.4–1,864.1 mi), so the earlier subs were forced to patrol close to the North American coast, whereas the Deltas could launch the >7700 km (4,784.6 mi)-range R-29s from the relative safety of the Arctic Ocean. In turn the Deltas were superseded by the larger Typhoon class submarines
Typhoon class submarine
The Project 941 or Akula, Russian "Акула" class submarine is a type of nuclear-powered ballistic missile submarine deployed by the Soviet Navy in the 1980s...

. The early Deltas remained in service until 1990s with treaties such as START I
START I
START was a bilateral treaty between the United States of America and the Union of Soviet Socialist Republics on the Reduction and Limitation of Strategic Offensive Arms. The treaty was signed on 31 July 1991 and entered into force on 5 December 1994...

. High running costs and the retirement of the Typhoons′ R-39 missiles meant that some Delta IIIs were reactivated in the early 2000s to replace the Typhoons.

, Pavel Podvig and russianforces.org estimated the strength of the Russian strategic submarine fleet at one Typhoon class submarine (used to test the R-30 Bulava missile), four Delta III, and six Delta IV class submarines, and one Borei. They will ultimately be replaced by the new Borei class submarines
Borei class submarine
The Borei class is a class of nuclear-powered ballistic missile submarine produced and operated by the Russian Navy. The class is intended to replace the Delta III, Delta IV and Typhoon classes now in Russian Navy service...

 (also known as the Dolgorukiy class). Five Delta IV boats have been overhauled in recent years, with work continuing on the last one.

Development

In the 1960s the Soviet Navy wanted new submarine-launched nuclear missiles that could threaten targets in North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 without their launch platforms needing to pass the SOSUS
SOSUS
SOSUS, an acronym for Sound Surveillance System, is a chain of underwater listening posts across the northern Atlantic Ocean near Greenland, Iceland and the United Kingdom — the GIUK gap. It was originally operated by the United States Navy for tracking Soviet submarines, which had to pass...

 sensors in the GIUK gap
GIUK gap
The GIUK gap is an area in the northern Atlantic Ocean that forms a naval warfare chokepoint. Its name is an acronym for Greenland, Iceland, and the United Kingdom, the gap being the open ocean between these three landmasses...

 to be within range.

Delta I (Project 667B, Murena) 18 boats


The Delta-class submarines could deploy on alert patrols in the marginal ice-seas of the Soviet Arctic littoral
Littoral
The littoral zone is that part of a sea, lake or river that is close to the shore. In coastal environments the littoral zone extends from the high water mark, which is rarely inundated, to shoreline areas that are permanently submerged. It always includes this intertidal zone and is often used to...

, including the Norwegian
Norwegian Sea
The Norwegian Sea is a marginal sea in the North Atlantic Ocean, northwest of Norway. It is located between the North Sea and the Greenland Sea and adjoins the North Atlantic Ocean to the west and the Barents Sea to the northeast. In the southwest, it is separated from the Atlantic Ocean by a...

 and Barents sea
Barents Sea
The Barents Sea is a marginal sea of the Arctic Ocean, located north of Norway and Russia. Known in the Middle Ages as the Murman Sea, the sea takes its current name from the Dutch navigator Willem Barents...

s. Consequently, unlike their predecessors, they no longer needed to pass through Western SOSUS
SOSUS
SOSUS, an acronym for Sound Surveillance System, is a chain of underwater listening posts across the northern Atlantic Ocean near Greenland, Iceland and the United Kingdom — the GIUK gap. It was originally operated by the United States Navy for tracking Soviet submarines, which had to pass...

 sonar
Sonar
Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...

 barriers to come within range of their targets. To improve the accuracy of the missiles, the Delta I submarines carry the Tobol-B navigation system and the Cyclone-B satellite navigation system.

After authorization of the development of the class in 1965, the first Delta-I, K-279
Soviet submarine K-279
K-279 was the first Project 667B Murena ballistic missile submarine of the Soviet Navy. Development of Project 667B began in 1965. Her keel was laid down in 1971 by Sevmash at the Severodvinsk shipyard...

, was commissioned into the Soviet Northern Fleet on the 22nd of December, 1972. A total of 18 submarines of this class were built, and all served Soviet Navy
Soviet Navy
The Soviet Navy was the naval arm of the Soviet Armed Forces. Often referred to as the Red Fleet, the Soviet Navy would have played an instrumental role in a Warsaw Pact war with NATO, where it would have attempted to prevent naval convoys from bringing reinforcements across the Atlantic Ocean...

, under the designation Project 667B Murena (eel).

As of 1991, nine Delta-I submarines were still in active service. Their decommissioning began in 1994, with removal of the missile compartments scheduled by 1997. All submarines of this class were taken out of service by 1998 and were scrapped by 2005.

Delta II (Project 667BD, Murena-M) 4 boats


The Delta-II class submarine was a large ballistic missile
Ballistic missile
A ballistic missile is a missile that follows a sub-orbital ballistic flightpath with the objective of delivering one or more warheads to a predetermined target. The missile is only guided during the relatively brief initial powered phase of flight and its course is subsequently governed by the...

 submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

 designed to remedy shortcomings in the Delta-I class submarine. The design was essentially the same, however the submarine was lengthened in the 4th and 5th compartments by 16 meters to allow the installation of 4 more missile tubes. The new type of Delta also received additional quietening measures including having the steam turbine
Steam turbine
A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into rotary motion. Its modern manifestation was invented by Sir Charles Parsons in 1884....

s mounted on shock absorbers, having all pipes and hydraulics separated from the hull through rubber insulation, and a special hydroacoustic coating
Anechoic tile
Anechoic tiles are rubber or synthetic polymer tiles containing thousands of tiny voids, applied to the outer hulls of military ships and submarines, as well as anechoic chambers...

 being applied to the hull.

The NATO reporting name, Delta-II indicates this submarine as a visually distinguishable new class. The Soviet designation, 667BD Murena-M indicates this submarine is an improved Delta-I.

Only four submarines of this class were built, apparently in favor of building the following class, Delta-III, and all Delta-IIs were out of service by 1996.

Delta III (Project 667BDR, Kalmar) 14 boats


The 667BDR Kal'mar (Squid) Delta-III class submarine is a large ballistic missile submarine. Like the earlier Delta class submarines the Delta III is a double hulled design with a thin low magnetic steel outer hull wrapped around a thicker inner pressure hull. Development began in 1972 at the Rubin Central Design Bureau for Marine Engineering. The submarine was the first that could launch any number of missiles in a single salvo, also the first submarine capable of carrying ballistic missiles with multiple independently targetable reentry vehicles. The submarine carried 16 of the R-29R missiles each carrying 3 to 7 MIRVs, with a range of 6,500 to 8,000 km, depending on the number of re-entry vehicles.

The Delta III was also equipped with a new battle management system the Almaz-BDR for the fire control of torpedo
Torpedo
The modern torpedo is a self-propelled missile weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with it or in proximity to it.The term torpedo was originally employed for...

es in deep-water, also a new inertial navigation system Tobol-M-1, and later the Tobol-M-2. A hydroacoustic navigational system called Shmeľ (Bumblebee) allows the submarine to determine its position from hydroacoustic buoys. Finally a new sonar
Sonar
Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...

 system called Rubikon was fitted.

On September 30, 2008 a Russian Navy spokesman reported that Ryazan had successfully completed a 30-day transit from a base in northern Russia under the Arctic ice cap to a base on the Kamchatka Peninsula
Kamchatka Peninsula
The Kamchatka Peninsula is a peninsula in the Russian Far East, with an area of . It lies between the Pacific Ocean to the east and the Sea of Okhotsk to the west...

. The Navy added that Ryazan will soon be assigned to regularly patrol the Pacific Ocean. , six Delta III boats were active, of which two were believed to be in the process of decommissioning.

K-433 Svyatoy Georgiy Pobedonosets was involved in a collision with a fishing vessel on September 22, 2011. The submarine did not sustain serious damage.
Delta III class — significant dates
# Shipyard Name Laid down Launched Commissioned Fleet Status
K-424 SEVMASH, Severodvinsk NA 30 January 1974 11 February 1976 30 December 1976 Northern Decommissioned 28 March 1995 for scrapping
K-441 SEVMASH, Severodvinsk NA 7 May 1974 25 May 1976 31 October 1976 Pacific Decommissioned 28 March 1995 for scrapping
K-449 SEVMASH, Severodvinsk NA 19 July 1974 29 July 1976 5 February 1977 Pacific in reserve from 1996, decommissioned in 2001, scrapped 2008
K-455 SEVMASH, Severodvinsk NA 16 October 1974 16 August 1976 30 December 1976 Pacific in reserve from 1998 to 1999, probably decommissioned
K-490 SEVMASH, Severodvinsk NA 6 March 1975 27 January 1977 30 September 1977 Pacific in reserve from 1998 to 1999, probably decommissioned
K-487 SEVMASH, Severodvinsk NA 9 June 1975 4 April 1977 27 December 1977 Northern in reserve from 1998 to 1999, probably decommissioned
K-496
Russian submarine K-496 Borisoglebsk
K-496 Borisoglebsk is a Russian advanced Delta III SSBN nuclear submarine. On 21 June 2005 the vessel served as the launch platform for a missile carrying a payload containing a solar sail experiment, Cosmos 1. The submarine was based in the Russian Northern Fleet...

SEVMASH, Severodvinsk Borisoglebsk 23 September 1975 13 August 1977 30 December 1977 Northern decommissioned on 9 December 2008 fuel discharged.
K-506 SEVMASH, Severodvinsk Zelenograd 29 December 1975 26 January 1978 30 November 1978 Pacific Removed from service in 2010, to be decommissioned
K-211
Russian submarine K-211 Petropavlovsk-Kamchatskiy
K-211 Petropavlovsk-Kamchatskiy is an Project 667BDR Kalmar class Russian nuclear ballistic missile submarine. The submarine was built by the Russian shipyard Sevmash in the late 1970s and joined the Soviet fleet in 1980...

SEVMASH, Severodvinsk Petropavlovsk-Kamchatskiy 19 August 1976 13 January 1979 28 September 1979 Pacific Active 2010
K-223 SEVMASH, Severodvinsk Podolsk 19 February 1977 30 April 1979 27 November 1979 Pacific Active 2010
K-180 SEVMASH, Severodvinsk NA 27 December 1977 8 January 1980 25 September 1980 Pacific In reserve from 2004, probably decommissioned
K-433
Russian submarine K-433 Svyatoy Georgiy Pobedonosets
K-433 Svyatoy Georgiy Pobedonosets is a Russian Project 667BDR Kalmar class nuclear-powered ballistic missile submarine. The submarine was built for the Soviet Navy and has continued to serve in the Russian Navy. K-433 was put in reserve in 1997 and remained there until 2004 when it was...

SEVMASH, Severodvinsk Svyatoy Georgiy Pobedonosets 24 August 1978 20 June 1980 15 December 1980 Pacific Active 2010
BS-136 (ex K-129
Soviet submarine K-129
Soviet submarine K-129 may refer to one or both of the following submarines of the Soviet Navy:, a Golf-class diesel-electric ballistic missile submarine that sank in March 1968; partially salvaged by the United States Navy with the Glomar Explorer, a Delta III-class nuclear-powered ballistic...

)
SEVMASH, Severodvinsk Orenburg 9 April 1979 15 April 1981 5 November 1981 Northern 1994-2002 - conversion to support submarine project 09786 (carrier of minisumbarine). Active as 2008
K-44 SEVMASH, Severodvinsk Ryazan 31 January 1980 19 January 1982 17 September 1982 Pacific Overhauled in 2007 Active 2010

Delta IV (Project 667BDRM, Delfin) 7 boats


The Delta IV is a class of Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n SSBN submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

. Seven were built from 1985 to 1992; all are still in service in the Russian navy today. The submarines, based at the Sayda Guba
Sayda Guba
Sayda-Guba , also known in English as Sayda Bay, is a rural locality which together with Gadzhiyevo, Olenya Guba, and Kuvshinskaya Salda as of 2008 is included in the administrative jurisdiction of the closed administrative-territorial formation of Alexandrovsk in Murmansk Oblast, Russia...

 Naval Base, operate in the Northern Fleet
Northern Fleet
The Red Banner Northern Fleet is a unit of the Russian Navy that has access to the Barents and Norwegian Seas, the Arctic and Atlantic Oceans, and is responsible for the defense of northwestern Russia. It was established in 1937 as part of the Soviet Navy...

. The Severodvinsk
Severodvinsk
Severodvinsk is a city in the north of Arkhangelsk Oblast, Russia, located in the delta of the Northern Dvina River, west of Arkhangelsk. Administratively, it is incorporated as a town of oblast significance . Municipally, it is incorporated as Severodvinsk Urban Okrug. The city was founded as...

 Shipyard built these vessels between 1981 and 1992. The last vessel was the Novomoskovsk
Russian submarine K-407 Novomoskovsk
Novomoskovsk is a Project 667BDRM Delfin-class ballistic missile submarine of the Russian Navy's Northern Fleet.-Background:...

.

The design of the Delta IV resembles that of the Delta III and constitutes a double-hulled configuration with missile silos housed in the inner hull.

The submarine has an operational diving depth of 320 meters, with a maximum depth of 400 meters. The propulsion system allows speeds of 24 knots (44 km/h) surfaced or submerged using two VM-4 pressure water reactors rated at 180 MW. It features two turbines of type GT3A-365 rated at 27.5 MW. The propulsion system drives two shafts with seven-bladed fixed-pitch propellers.

Overall design

The submarine design is similar to that of Delta III (Project 667 BDR). The submarine constitutes a double-hulled configuration with missile silos housed in the inner hull.
The forward horizontal hydroplanes are arranged on the sail
Sail (submarine)
In naval parlance, the sail or fin of a submarine is the tower-like structure found on the dorsal surface of submarines...

. They can rotate to the vertical for breaking through the ice cover. The operational diving depth of the submarine is 320 m with a maximum depth of 400 m. The propulsion system provides a run speed of 24 knots surfaced and 24 knots submerged. The submarine carries supplies for an endurance of 80 days. The surface of the submarine has an acoustic coating to reduce the acoustic signature
Acoustic signature
Acoustic signature is used to describe a combination of acoustic emissions of ships and submarines.-Contributing factors:The acoustic signature is made up of a number of individual elements...

.

During the development of the 667BDRM SSBN several measures were included to reduce its noise level. The gears and equipment are located on a common base isolated from the pressure hull, and the power compartments are also isolated. The efficiency of the anti-hydroacoustic coatings of the light outer hull and inner pressure hulls have been increased. Newly designed five-bladed propellers with improved hydroacoustic characteristics are employed.

See Delta III class overview for specifications.

Armament

The Delta IV submarines employs the D-9RM launch system and carries 16 R-29RMU Sineva
R-29RMU Sineva
The R-29RMU Sineva , also designated RSM-54,is a Russian liquid-fuelled submarine-launched ballistic missile. It has the GRAU index 3M27, and is identified by NATO as the SS-N-23 Skiff...

 liquid-fueled missiles which each carry four independently targetable reentry vehicles (MIRVs). Unlike previous modifications, the Delta IV submarine is able to fire missiles in any direction from a constant course in a circular sector. The underwater firing of the ballistic missiles can be conducted at a depth of 55 meters while cruising at a speed of 6-7 knots. All the missiles can be fired in a single salvo.

The 667BDRM Delphin submarines are equipped with the TRV-671 RTM missile-torpedo system that has four torpedo tubes with a calibre of 533 mm. Unlike the Delta III, it is capable of using all types of torpedo
Torpedo
The modern torpedo is a self-propelled missile weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with it or in proximity to it.The term torpedo was originally employed for...

es, antisubmarine torpedo-missiles and anti-hydroacoustic devices. The battle management system Omnibus-BDRM controls all combat activities, processing data and commanding the torpedo and missile-torpedo weapons. The Shlyuz navigation system provides for the improved accuracy of the missiles and is capable of stellar navigation at periscope depths. The navigational system also employs two floating antenna buoys to receive radio-messages, target destination data and satellite navigation signals at great depth. The submarine is also equipped with the Skat-VDRM hydroacoustic system.

The Delta IV submarines are strategic nuclear missile submarines designed to carry out strikes on military and industrial installations and naval bases. The submarine carries the RSM-5 Makeyev missile (NATO reporting name: SS-N-23
SS-N-23
The R-29RM Shtil is a liquid propellant, submarine-launched ballistic missile in use by Russia. It has the alternate Russian designations RSM-54 and 3M27...

 Skiff) submarine-launched ballistic missile (SLBM). The RSM-54 is a three-stage liquid-propellant ballistic missile with a range of 8,300 km. The warhead consists of four to ten multiple, independently targeted re-entry vehicles (MIRVs) each rated at 100 kt. The missile uses stellar inertial guidance to provide a circular error probable
Circular error probable
In the military science of ballistics, circular error probable is an intuitive measure of a weapon system's precision...

 (CEP) of 500 m. The CEP value is a measure of the accuracy of strike on the target and is the radius of the circle within which half the strikes will impact.

The submarine is also capable of launching the Novator SS-N-15
SS-N-15
The RPK-2 Viyuga cruise missile is a complex Russian submarine launched missile. Its NATO reporting name is Starfish ....

 Starfish anti-ship missile
Anti-ship missile
Anti-ship missiles are guided missiles that are designed for use against ships and large boats. Most anti-ship missiles are of the sea-skimming type, many use a combination of inertial guidance and radar homing...

 or Mk 40 anti-ship torpedoes. Starfish is armed with a 200 kt nuclear warhead and has a range of up to 45 km. The submarine has four 533 mm torpedo tubes capable of launching all types of torpedoes, including anti-submarine torpedoes and anti-hydroacoustic devices. The system is fitted with a rapid reloading torpedo system. The submarine can carry up to 18 missiles or torpedoes. All torpedoes are accommodated in the bow section of the hull.

In 2011 K-84 Ekaterinburg successfully tested a new version of the SS-N-23 missile, repotedly designated R-29RMU2 Liner. The missile has improved survivability against anti-ballistic missiles. Later on K-114 Tula conducted another successful launch.

Deployment

Initially all the Delta IV submarines were based with the Russian Northern Fleet at Olenya Bay
Olenya Bay
Olenya Bay Russian naval base is a part of the naval installation at Gadzhievo .-External links:*...

. All the submarines of this class serve in 12th Squadron (the former 3rd flotilla) of strategic submarines of the Northern Fleet, which has relocated to Yagelnaya.

Units

Delta IV class — significant dates
# Shipyard Name Laid down Launched Commissioned Fleet Status
K-51 SEVMASH, Severodvinsk Verkhoturye 23 February 1981 7 March 1984 28 December 1984 Northern In overhaul, general overhaul in 1999, minor overhaul with installation upgraded Sineva missiles undergo from 2010
K-84 SEVMASH, Severodvinsk Ekaterinburg 17 February 1982 17 March 1985 30 December 1985 Northern Active, overhaul in 2002, overhaul complete, upgraded Sineva missiles installed
BS-64
Russian submarine BS-64 Podmoskovye
Podmoskovye is a Project 667BDRM Delfin-class ballistic missile submarine of the Russian Navy. She was originally designated K-64....

 (ex K-64)
SEVMASH, Severodvinsk Podmoskovye 18 December 1982 2 February 1986 23 December 1986 Northern From 1999 is in conversion to a special purpose platform
K-114 SEVMASH, Severodvinsk Tula 22 February 1984 22 January 1987 30 October 1987 Northern Active, overhaul in 2006, overhaul complete, upgraded Sineva missiles installed
K-117
Russian submarine K-117 Bryansk
K-117 Bryansk is a Russian Project 667BDRM Delfin class nuclear-powered ballistic missile submarine. The submarine was laid down in April 1985 in the Russian Northern Machinebuilding Enterprise, Sevmash. In September 1988 the submarine was commissioned in the Soviet navy...

SEVMASH, Severodvinsk Bryansk 20 April 1985 8 February 1988 30 September 1988 Northern Active, overhaul 2002-08, overhaul complete, upgraded Sineva missiles installed
K-18 SEVMASH, Severodvinsk Karelia 7 February 1986 2 February 1989 10 October 1989 Northern Active, overhaul 2004-10, overhaul complete, upgraded Sineva missiles installed
K-407
Russian submarine K-407 Novomoskovsk
Novomoskovsk is a Project 667BDRM Delfin-class ballistic missile submarine of the Russian Navy's Northern Fleet.-Background:...

SEVMASH, Severodvinsk Novomoskovsk 2 February 1987 28 February 1990 27 November 1990 Northern In general overhaul from 2008 with installation of upgraded Sineva missiles. It will be back in 4Q/2011

Delta class submarines in fiction

  • In the novel Ice by James Follett
    James Follett
    James Follett is an author and screenwriter, born in 1939 in Tolworth, England.Follett became a full-time fiction writer in 1976, after resigning from contract work as a technical writer for the British Ministry of Defence. He has since written over 20 novels, several television plays, and many...

     a Delta II class submarine called the Podorny is dispatched to the South Atlantic to search for a missing British submarine.
  • In the pilot movie for seaQuest DSV
    SeaQuest DSV
    seaQuest DSV is an American science fiction television series created by Rockne S. O'Bannon. It originally aired on NBC between 1993 and 1996. In its final season, it was renamed seaQuest 2032. Set in "the near future", seaQuest mixes high drama with realistic scientific fiction...

     a heavily modified Delta IV was being operated by pirates, led by former seaQuest captain Marilyn Stark.
  • In the video game Crysis Warhead
    Crysis Warhead
    Crysis Warhead is a science fiction first-person shooter computer game developed by the studio Crytek Budapest, Hungary, and published by Electronic Arts. Crysis Warhead is a stand-alone expansion game and does not require Crysis installed to play...

    , the player character incorrectly identifies a cargo submarine as a Project 914 Delta IV class. The submarine in question has the missile bay removed and replaced with a large cargo bay.
  • In Terminator Salvation: Cold War, Dmitri Losenko commanded a Delta IV-class submarine called the Gorshkov. When the US launches an attack on Russia the Gorshkov launches an attack on Alaska
    Alaska
    Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

    .

External links


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