Complete information & Analysis on India's Akula II SSN ("INS Chakra" and "Second One")

[Major Shaitan Singh]

Multipurpose nuclear submarine. Development of PLA pr.971 started SKB-143 "Malachite" (Leningrad, Chief Designer Georgy Chernyshev, from August 1976 after 1997 - Yu.I.Farafontov) TTZ 1972 on "the development of a large multi-purpose nuclear submarine 3rd generation "as a counterpart to the PLA pr.945 the replacement of titanium alloys in the construction of steel. The project used to study low-noise submarines pr.991 and pr.958. A brief preliminary design (preliminary design) developed by the beginning of 1976. In the development of the technical project, on which work began on the joint decision of SMEs and the Navy, dated 27 July 1976 and participated Krylov Shipbuilding Research Institute. Academician AN Krylov (especially in terms of noise reduction PLA). Group chief designer formed in August 1976

Design : Engineering design of the boat is designed from September 1976 to May 1977 One of the main problems that faced by developers - keeping SSN within tonnage stated in conceptual design. Technical project reviewed 1 Central Research Institute of the USSR Ministry of Defense (shipbuilding) in June 1977 and approved September 13, 1977 with the proviso that in the process of development and construction drawings necessary to provide even greater noise reduction, placing launchers GSPC, CBRC accommodation with the possibility of applying for coastal targets. After receiving the information about innovations on American submarines type Los-Angeles, which were expressed in the SAS installation with digital signal processing, which reduces the effect of the intrinsic noise of the PLA, as well as taking into account the wishes of the leadership of the Navy submarines equipped CBRC " Garnet "(Resolution of the USSR Council of 26 May 1978), the project was redesigned for the installation of additional HOOK "Skate 3", which required modification of the body. The project commissioned in 1980

PLA Chakra / K-152 "Nerpa" pr.971I - Improved AKULA on the way to India, the end of March 2012 ( http://www.militaryphotos.net ).

One of the early versions pr.971 ( http://forums.airbase.ru )

Production : Pre-production series boats pr.971 at a shipyard in Komsomolsk-on-Amur (plant №199) was carried out from 1978 Head PLA K-284:
- lies at the end of 1980
- the first piece of equipment installed in a robust housing in June 1983
- BS board set 6 November 1983
- official date listed bookmarks November 11, 1983
- hull assembly completed in February 1984
- the submarine K-284 is derived from a plant in the transport and release floating dock "Cupid" July 16, 1984
- the beginning of transportation submarine floating dock on the acceptance base in p.Bolshoy Stone - October 16, 1984
- Launching of the floating dock in the bay Chikhacheva, PPU start - up to 25 October 1984
- came under its own power for acceptance the base of the plant in p.Bolshoy Stone and was planted on a bank (were clogged with mud circulation route) October 25, 1984
- two unsuccessful factory stage sea trials - because of absenteeism foam on the power of more than 50% (due to clogged circulation routes) - from December 7, 1984
- cleaning circulation routes - 7-20 December 1984
- the third stage of a successful factory navigation test - before the end of December 1984
- the signing of the act of receiving the submarine K-284 - December 30, 1984 (stating list of works carried on 1985)

Testing and adoption . Factory testing of K-284 launched December 7, 1984 and officially submarine K-284 Navy put the signing of the Act of acceptance December 30, 1984 after which, based in p.Bolshoy Stone launched a fine-tuning equipment and testing systems. Acoustic finishing submarine K-284 is made in the period from 1985 to 1987 Finishing and painting - 1986 Since 1986 the head submarine provided the same test series PL pr.971. Sea trials conducted in 1986-1987 gg The first launches of CBRC "Garnet" - January 1987 Checking technology and the complexity of navigation and dock repairs carried out in 1987 and in 1989 the SJC and of the weapons systems were finished and put into operation in 1988, the first dive at extreme depths held July 1, 1989 At this point, the submarine K-284 took more than 50,000 miles and had time between the basic mechanisms of approximately 10,000 hours. Test all systems PLA completed only in 1990

One of the first photos of PLA pr.971 AKULA (probably K-284 "Shark") published in the Western media (Soviet Military Power 1987. USA. 1987).

One of the first photos of PLA pr.971 AKULA (probably K-284 "Shark") published in the Western media (photo US NAVY, 1980).

Parent PLA K-284 "Shark" pr.971 AKULA on sludge in Pavlovsk Bay, Pacific Fleet, November 1996 (photo V.Lemonosa,http://www.podlodka.su )

The second in a series of PLA pr.971 AKULA - K-263 "Barnaul" / "Dolphin" in the 45th Division of the Pacific Fleet submarines (soot MI, chart the road "Bars". Website http://shturman.vlms.ru )

PLA pr.971 built in Komsomolsk-on-Amur (plant №199, from 1983 to the present) and in Severodvinsk ("Sevmash" - plant №402, shop №50, from 1985 to 2001 ), and the original plan was planned to build 25 submarines (SSNs were laid 20). By default, the PLA pr.971.

Roll-out of the shop in the "Sevmash" PLA pr.971 K-480 "Bars", 16 April 1988 (panorama shots of the documentary "The impact force. Underwater Hunter", ORT, 2007-2008)

PLA "Sperm Whale" K-322, in October 1993, the Pacific Ocean (Photo US NAVY)

The design of the submarine - double-hulled, tail empennage fairing with a towed sonar on the top upright handlebars. The robust housing made of steel of a new brand with a yield strength of 100 kgf / mm (thickness up to 48 mm, processing presses FUJICAR) and is divided into 7 sections. During the design phase problem was solved significantly (about 5 times in comparison with PLA 2nd generation) noise reduction using low-noise design study PLA pr.991. Assembling the case is made by the block method: PLA equipment installed inside the enclosure for shock absorbers and mnogopalubnyh blocks of depreciation ("whatnot") that are part of a two-stage system obschekonstruktsionnoy the depreciation (each block is isolated from the rubber-pneumatic shock absorbers). PLA body is covered with a rubber coating protivogidroakusticheskim. Inside and outside the pressure hull submarines used vibration-absorbing and vibration insulation coating. According to some reports using active means of reducing noise. PLA equipment meets the standards of vibro-acoustic characteristics of the VAC-74. On PLA improved habitability conditions of the crew.

 

[Major Shaitan Singh]

External devices and layout of PLA pr.971 AKULA. Obozracheno numbers: 1 - starters GSPC, 2 - alarm pop-up buoy, 3 - antenna Sox 4 - sonar, 5 - periscope 6 - VSC unit - pop rescue chamber, 7 - antenna radar, direction finder and communications, 8 - exhaust diesel, 9 - scuppers (openings in the outer hull) 10 - container towed sonar, 11 - the screw 12 - overflow, 13 - a cover of the auxiliary thruster screw column 14 - fence fittings such as "Fin", 15 - drain holes, 16 - horizontal steering wheel, 17 - Cover torpedo tubes (http://********************* ).
The reactor compartment hull PLA was designed with an isolated location of the reactor and pump cubicle with biological protection. In the room were placed billboards second-tier power system PLA. Since PLA K-322 (serial №513) introduced 25 measures to reduce noise including amortized main bearing shaft line. Since PLA K-391 (serial №514) installed generators powder blowing tsictern main ballast. By starting with the PLA-391 is installed on PLA outboard fittings circulation tracks like "Fin" - a form of intake becomes flat rather than round in cross-section. Since PLA K-461 (zav.№831, Sevmash) and K-295 (zav.№ 517 SZLK) on 34 boats set new mechanism with the relevant rules of vibro-acoustic characteristics of the VAC-80. According to some reports on PLA pr.971 system is used on the boundary layer effects washer body of water in order to reduce resistance, which probably worked on the towing submarines etc. .1710 "Mackerel" (confirmation of this information is not available).

Assembly shop PLA pr.971 AKULA at the Amur Shipyard (Ships and destinies. Amur Shipbuilding Plant - 70 years. Khabarovsk "Amur lists", 2002)

Construction Corps of PLA pr.971 AKULA at the Amur Shipyard (Ships and destinies. Amur Shipbuilding Plant - 70 years. Khabarovsk "Amur lists", 2002)

One of the buildings PLA pr.971 AKULA manufacturing "Sevmash" (probably K-328 "Leopard" or later PLA, Форумы Balancer'а )

PLA K-461 "Wolf" pr.971, Gadjievo, December 2010 (photo - Rustem Adagamov, Журнал Другого ).


Engines :
- NPS with water-cooled thermal reactor VM-5 with a steam generating unit (PPU) OK-650M.01 (K-284 and the other PLA) with a capacity of 190 MW (based on the base model, OK-650.BZ). Two two-section of the steam generator. Designers PPU - Simon RI ,, Farafontov Yu, Bogdanovich VP, Rynska MV PPU is set to U-shaped cantilever beams embedded in the transverse bulkheads (including tank water protection). PPU was later used on submarines of other projects. PPU is equipped with an emergency battery-less cooldown with outboard titanium heat exchangers, light sealed tank water biological protection with the system of compensation.

- 1 x block-shaft steam turbine plant (STP) with GTZA OK-9M (in the first issue of PLA plant in Komsomolsk-on-Amur) and OK-9VM with improved power Amortization 43000-50000 hp (According to various estimates, the probability of 50,000 hp). At the head of PLA K-284 - OK PTU-9B. PTU is mounted on the intermediate frame amortized based on mezhotsechnye bulkhead with the removal of the main circulation pumps in adjacent compartments.

- 2 x thrusters submersible 2 speed electric motor propeller PG-160 (?) To 410 hp (370 hp dr.dannym). Located in advancing columns of OK-300 (chief designer - A.M.Kuzmin).

Retractable thruster spiral column OK-300 with electric submarines pr.971 AKULA (still from the documentary, http://forums.airbase.ru )

Movers - one shaft, one 7-bladed fixed pitch propeller with improved hydroacoustic characteristics and reduced speed. Stern bearing of the main shaft is equipped with a cooling system samoprotochnogo, which significantly reduces noise levels. Two reclining thrusters OK-300. Screws for pr.971 manufactured using purchased from Toshiba's bypassing restrictions Kokomo high-precision machine tools (used also for other projects PL 3rd generation). Nasal hydroplanes with flaps, pull-out. Cooling system with water intake to the central route (starting with K-391 type "Fin" - more efficient).

 

[Major Shaitan Singh]

The main propulsion submarines pr.971 AKULA - 7-bladed propeller (left to right - one of the "Komsomol" buildings in the floating dock, and roll-out of PLA K-335 "Cheetah" with PO "Sevmash", all photos with http: // forums. airbase.ru and from the film "Submarine Squadron" Sevmash ", 2006)

Screw PLA K-480 "Ak Bars" pr.971 installed as a monument about CA "star" in Severodvinsk. Edge vnta processed and differ from the original. September-October 2013 (photo - Oleg Kuleshov, http://kuleshovoleg.livejournal.com ).

Intakes circulation paths of the first body (left, K-480 "Leopard") and type "Fin" (right, all photos with http://forums.airbase.ru )

Energy - two turbogenerator AC OK-2 with a capacity of 3200 kW, two reversible DC-DC converter.
Backup power supply - two groups of lead-acid batteries, 2 x diesel generators DG-300 with 750 hp (At 1 x dr.dannym ASDG-800-1 or ASDG 1000 - possible. Subseries different on different diesel generators) with reversible converter, fuel tank - 10 days.
Since PLA K-391 are installed emergency electric power network, and starting PLA with K-461 (zav.№831, Sevmash) and K-295 (zav.№517, SZLK) installed outboard emergency power network.

Saving and life-support system - pop Rescue Chamber (ECC) - ECC unit - the development and analogue FAC PLA pr.705. On PLA K-152 "Nerpa" pr.971I installed WSS new design (see figure). Loch extinguishing system (anti-gas volume boat) with a working substance-fire-extinguishers Chladone 114b2 (freon). Rescue universal set of KSU-600N-4 for remote automatic release liferafts PSNL-20 (4 pcs, only PLA K-335 "Cheetah", the system is designed CDB "Lapis"). The system of air regeneration "Astra-3." The new combined system of electro-chemical air regeneration (EHRV) - from submarines K-461 (zav.№831, Sevmash) and K-295 (zav.№517, SZLK).

VSC unit - pop rescue chamber PLA pr.971I "Irbis" Improved AKULA K-152 "Nerpa" ( http://flickr.com ). Demonstration of the universal rescue complex KSU-600N-4 for the production of liferafts on submarines K-335 "Cheetah" ( Газета "За инженерные кадры" ).

TTX submarine :
The crew - 73 people (including 33 officers)
Length:
- 108.25 m (at TEHPROEKT May 1977)
- 110.3 m (AKULA, Improved AKULA)
- 113.3 m (AKULA-II / pr.971U and K-335 AKULA-III)
Width - 13,5-13,6 m
Width of Coarse horizontal handlebars - 15.4 m
Draft average - 9.68 m
diameter pressure hull (for example, the reactor compartment) - 10.9 m

Displacement above water:
- 7540 tons (for preliminary design TTZ)
- 7740 tons (by TEHPROEKT May 1977)
- 8140 tonnes (pr.971 AKULA, govt ON "Sevmash")
- 8470-8500 tons (according to various sources AKULA-II / K-335 AKULA-III)
Displacement underwater:
- 12770 tonnes (pr.971 AKULA, govt ON "Sevmash")
- 13400-13800 tons (according to various sources AKULA-II / K-335 AKULA-III)

Speed surface speed:
- 10 kt
- 20 kt (according to Western sources)
- 11.6 kt by dr.dannym (including K-152 "Nerpa"?)
- 12 knots (pr.971U)
Submerged speed:
- 6-9 bonds (quiet running)
- 33 kt
- 35 kt (according to Western sources)
Submerged speed motors for thrusters - 5 kt
Immersion depth limit - 600 m
Immersion depth Working:
- 480 m (AKULA, Improved AKULA)
- 520 m (AKULA-II and including K-152 "Nerpa"?, But perhaps for all PLA project)

Autonomy - 100 days (reserves)

Noise and the detection range of PLA pr.971 for various fragmentary data:
- Maximum range of detection boats pr.971 HOOK AN / BQQ-5 (SSN Los-Angeles) - 10 km (1995 data, Jeremy Boord).
- When the speed of the 6-9 bonds of the first housing PLA pr.971 not detected by the PLO United States (1995 data, Jeremy Boord).
- Noise submarines K-284 at 12-15 dB or 4-4.5 times lower noise SSN, etc. .671RTM VICTOR-III (Jane's)
- Noise SSN-335 K below the noise level of K-284 3.5-fold (AP Alekseev, Samarkin LA)
- In the natural background in the 40-45 dB noise calm PL pr.971 was 60-70 dB - a series of submarine and measuring conditions are unknown, Kamchatka ( http://forums.airbase.ru ).
- At the same time the PLA pr.971 considered to be more noisy than PLA SeaWolf or Improved Los-Angeles (Unspecified). According to Western (1994) noise PLA pr.971 Improved AKULA at speeds of 5-7 bonds is similar to or below the noise Improved Los Angeles-(http://forums.airbase.ru ).

The estimated cost of PLA pr.971 - 1.55 bn. USD (in 1995 prices)

Armament:
4 x 650 mm nasal TA (65-76 ammo 12 torpedoes, rockets PLRK RPK-7 "Wind" )
4 x 533 mm nasal TA (28 torpedoes UGST ammunition, USET-80 et al., CBRC 3M10 "Garnet" or "Turquoise", rockets PLRK RPK-6 "Waterfall" ). PLA K-152 "Nerpa" pr.971I - 8 x 533 mm nasal TA
System of training TA "Grinda"
Ammunition - total - 40 torpedoes, rockets, torpedoes or mines samotransportiruyuschihsya. According to Soviet-American agreements in 1989 as part of an arms ammunition shall not apply with nuclear warheads. On one of the submarines were tested Plourac'h "Splash" (not confirmed data less).

By starting with the PLA-391 (zav.№514) pr.971 / 09710 AKULA boats set 6 x 533 mm disposable non-rechargeable launchers REPS-324 "barrier" for running the sonar counter, located in the superstructure (since PLA K 391 - factory №514) - ie part AKULA, Improved AKULA, AKULA-II and AKULA-III, except K-152 "Nerpa"). Ammunition - 6 SGAPD. Initially, the West PU data were perceived as launchers for vertical launch CBRC "Pomegranate" / SS-N-21 SAMPSON.
SGAPD: MG-74 "corundum-2" MG-104 "Throw" MG-114 "Beryl"

 

[Major Shaitan Singh]

Replacement liner-launcher SGAPD "barrier" and SGAPD MG-104 "Throw" (magazine "Shipbuilding", http://forums.airbase.ru )

MANPADS "Strela-3" or "Eagle" - 3 CP, 12 missiles.

Equipment:
Hydroacoustic equipment and CICS:

CICS IDP-132 (?) "Omnibus" CRI design "Agate". On PLA pr.971M K-335 "Cheetah" - "Omnibus-U".

Sonar system (SJC) CIM-540 "Skate 3" SHARK GILL with digital processing of information developed by CRI "Morphyspribor", St. Petersburg, chief designer Kakalia VA Research conducted since 1980 on the basis of the CIM-500 "Scat". In terms of features HOOK CIM-540 is not inferior to American counterparts - the SJC upgraded AN / BQQ-5 and AN / BQQ-6. Final test equipment SJC held in 1986-1987 gg in the Sea of Japan and completed only in 1988 (PLA K-284 "Shark" pr.971 AKULA):
- commissioning and factory testing of the prototype at the head HOOK TO PLA-284 - 1985-1986
- state test pilot SJC sample including in ocean conditions - 1986-1987 gg
- SJC refinement and testing of the marine environment - in 1988
- due diligence fighting properties submarines - 1988 In the second series of PLA - planned to be built after the K-335 "Cheetah" was supposed to lead modernization of the SJC. The composition of the SJC:


1. The equipment of general purpose with the information on the control panel;

2. Equipment shumopelengovaniya in the audio frequency range and equipment ehopelengovaniya (sonar);
- The device №1 - bow passive-active sonar search and attack (SHARK GILL), operating at medium and low frequencies; fairing main antenna HOOK - beznaborny fiberglass.
- 2 x onboard conformal antenna "Shark" great length;

Layout device №1 HOOK CIM-540 "Skate 3" / SHARL GILL ( http://submarine.su )

4. Hardware detection sonar signals working sonar (sonar exploration) with ASG ASG detect enemy MG-70 (common designation MT-70 - doubtful);

5. Equipment sonar communication and state identification CIM-80;

6. Subsystem №6 - shumopelengovaniya equipment at low frequencies using towed extended antenna MGBS-541 "Skate 3" (located in the nacelle fairing-OLA-1-3 on the upper vertical handlebar).

7. Apparatus classification purposes using a digital library of noise; Research "Basis", "Melody", "method", "Cape", "Signal" held CRI "Morphyspribor" in 1979-1987 gg At the same time, the SJC CIM-540 solved the problem of classification for purposes of information from all subsystems of the SJC;

8. Equipment for the control of the complex.

In addition, together with a set of work following the CEO:
- GAS minoiskaniya MG-519 "Harp-M"
- GAS measuring the speed of sound in water MG-543 "reflector" or "tow-M" (?)
- GAS determine the start of the propeller cavitation MG-512 "Screw-M"
- Eholedomer MG-518 "North-M"
- Navigation in ice detector fractures NOR-1
- Navigation detector circular NOC-1

The detection range of the SJC is 3 times the detection range of the SJC PLA 2nd generation.
Detection range - 220-230 km (according to various sources)
Number of simultaneously tracked sonar goals - 30

The main passive antenna HOOK CIM-540 "Skate 3" SHARK GILL PLA pr.971 ( http://paralay.iboards.ru )


pr.971I "Irbis" Improved AKULA (K-152 "Nerpa") - CICS 'Omnibus-E "HOOK" Skate 3 "export version (have the same setup data CIM-400ME-3 with an antenna HOOK" Skat- 3 ", but these were considered equivocal).

Remote control HOOK on submarines K-152 "Nerpa" pr.971I ( http://paralay.iboards.ru )

During the renovation and modernization of the PLA "sperm whale" (Head №513) pr.971 at the Amur CVD is planned to replace the SJC to SJC "Coho". By the end of 2012 time frame for completion of repair boats are not clear ( source ).

Nonacoustic means:
submarine detection equipment and enemy ships to swirl - SOX (station detection wake) OLS 200-1 "Toucan". Equipment SOX fixed parameters of vessel traffic and submarines for approximately 30 minutes to a few hours after the passage. Installed on boats since the K-322 (serial №513) standard OLS 200-1 "Toucan". On PLA K-480 "Bars" is set sample device SOX OLS 200 "Toucan" with protective petals. On PLA K-461 and K-328 device SOX missing (most likely in the construction of submarines was not complete, it was planned to put in the middle of repair). On PLA K-152 "Nerpa" SOX is not imposed in connection with the export destination of the ship.

 

[Major Shaitan Singh]

Sensors SOX OLS 200 "Toucan" on the superstructure and a fence cutting submarines K-157 "Wild Boar" pr.971 AKULA-II

SOX sensors on the vertical panel PL pr.671RTM VICTOR-III (possibly OLS 100 "Kolos", not earlier chronicles frame 1982 from the documentary "The impact force. Underwater Hunter", ORT, 2007-2008 )

Radar equipment:
radar "Radian" / SNOOP PAIR MRKP-58 or "Radian-U" ("simplified") MRKP-59 with one antenna (since PLA K-461 / zav.№831, Sevmash and K-295 / zav.№517, SZLK).

Name modification Radar MRKP-58
Radar MRKP-59 Note
K-284 (zav.№501) pr.971 AKULA there is -
K-263 (zav.№502) pr.971 AKULA there is -
K-322 (zav.№513) pr.971 AKULA there is -
K-480 (zav.№821) pr.971 AKULA - is there?
may be replaced with MRKP-59 during operation can be test (?)
K-391 (zav.№514) pr.971 AKULA there is -

K-317 (zav.№822) pr.971 AKULA there is -
K-331 (zav.№515) pr.971 AKULA there is -

K-461 (zav.№831) pr.971 Improved AKULA - there is
K-328 (zav.№832) pr.971 Improved AKULA - there is
K-154 (zav.№833) pr.971 Improved AKULA - there is
K-419 (zav.№516) pr.971 Improved AKULA is there?
K-295 (zav.№517) pr.971 Improved AKULA - there is
K-157 (zav.№834) pr.971 AKULA-II - there is
K-335 (zav.№835) pr.971 AKULA-III - there is
K-152 (zav.№518) pr.971I Improved AKULA ?

Radar antenna post "Radian" MRKP-58 SNOOP PAIR (file photo AndreyKS, http://forums.airbase.ru )

EW system "Bay"
radar gosopoznavaniya "Nichrome-M" / AMBER LIGHT
finder "Zone" / RIM HAT
Other Systems :
Automated complex system of technical means of PLA.

Inertial navigation complex "Symphony-071" (K-284, K-253, K-322 as a minimum) with girokorrektorom "Scandium" and onboard computer or complex "Symphony-U" (possibly submarines K-335 "Cheetah"?). Perhaps prototype or research on the topic of which was developed complex was called "Bear-971" (found in the media). Maximum storage time navigation data to ensure the specified accuracy of navigation - more than 7 days (underwater without determining the place). One of the best results on the accuracy of NK received in 2002 during the military service submarines K-295 - for 6.5 days in a submerged position with no fixed position error does not exceed 10 submarines cables (1852 m). The main mode of the navigation system - "Special".

Satellite navigation system "Synthesis".

Automated complex radio "Lightning-MC" / KREMMNY-3, including:
- Satellite communication system "Tsunami-BM" towed antenna - unit K-659 "Hall" (located in the superstructure for cutting fenced)
- Antenna and telecommunication system "Bark" / PERT SPRING
- VHF "Anis" / PARK LAMP
- Radio station R-790 (different versions), R-143, R-855UM (3 sets), P-159 (6 sets), the product P-405, "Call", "Berth" (3 sets), the P-105M (data not accurate, completing submarine pr.971 AKULA first edition). Emergency signal buoy B-600-1.

Optical sightseeing TV system MTC-110 (allows optical observation at depths of up to 50-60 m). Periscopes commander PZKE-11 or PZKE-21 (according to various sources) "The Swan" and astro-navigational periscope "Signal-3."

Fencing cutting and sliding devices on the submarine K-157 pr.971 "Wild Boar" AKULA-II (bottom model, author - Kuznetsov AF, Severodvinsk).

 

[Major Shaitan Singh]

Towed unit K-659 "Hall" ( http://forums.airbase.ru )


Modifications:
pr.971 / 09710 "Bars" / "Pike-B" - AKULA (1984) - the basic design of the PLA (K-284, K-263, K-322, K-391, K-331, K-480, K-317, K-461). Boats can be divided into several subclasses:

Name modification noise SOX circulation
"Fin" PU GSPC Note
K-284 (zav.№501) pr.971 / 09710 AKULA base - - - headache
K-263 (zav.№502) pr.971 / 09710 AKULA base - - - 1st serial
K-322 (zav.№513) pr.971 / 09710 AKULA reduced there is - -
K-480 (zav.№821) pr.971 / 09710 AKULA reduced there is - - SOX-protected
K-391 (zav.№514) pr.971 / 09710 AKULA reduced there is there is there is
K-317 (zav.№822) pr.971 / 09710 AKULA fulfilled
the requirements of the Navy
project
there is there is there is
K-331 "Magadan" (zav.№515) pr.971 / 09710 AKULA fulfilled
the requirements of the Navy
project there is there is there is

pr.971 - Improved AKULA (1992) - Transition project PLA with improved hydroacoustic characteristics and updated avionics, according to some sources, the official name of the project has not changed (K-328, K-154, K-419, K-295). In the Western media meets the name of "pr.971U."

Name modification noise SOX circulation
"Fin" PU GSPC Note
K-461 "Wolf" (zav.№831) pr.971
Improved AKULA piece of equipment with the VAC-80 - there is there is
a new system EHRV (see above)
K-328 (zav.№832) pr.971
Improved AKULA piece of equipment with the VAC-80 - there is there is a new system EHRV (see above)
K-154 "Tiger" (zav.№833) pr.971
Improved AKULA piece of equipment with the VAC-80, tougher requirements
there is there is there is a new system EHRV (see above)
K-419 (zav.№516) pr.971
Improved AKULA ?
there is there is there is ?
K-295 (zav.№517) pr.971
Improved AKULA piece of equipment with the VAC-80, tougher requirements there is there is there is a new system EHRV (see above)

PLA K-461 "Wolf" pr.971 Improved AKULA in the Kola Bay. Northern Fleet, March 2001 (Photo by Ilya Kurganova,http://www.submarines.narod.ru ). Presumably PLA K-154 "Tiger" (zav.№833) pr.971 - Improved AKULA ( http: // forums.airbase.ru ). K-154 "Tiger" (zav.№833) pr.971 - Improved AKULA about PLA carrier midget submarine "Orenburg" in the Deer Bay, photo 1 and 5 June 2005 (author photo - Den, http://fotki.yandex.ru ). K-154 "Tiger" (zav.№833) pr.971 - Improved AKULA there in 2010. At the PLA probably dismantled sensors SOX or part of the sensors (photo from alex1976 archive, http://forums.airbase.ru ).

pr.971 / pr.971U (?) - AKULA-II (1995) - a transition project with the modified PLA (longer than 3 m) for the installation of new equipment, rugged, according to some sources, the official name of the project has not changed. According to the project at "Sevmash" built only PLA - K-157 "Wild Boar". Structurally and compositionally equipment complies with Class submarines AKULA-III, but without changing the shape of the fence and sliding devices fairing towed sonar. Active equipment installed to reduce the acoustic signature of PLA (probably SAG - a system of active noise suppression in the range 50-500Gts). In the Western media meets the name of "pr.971A."

 

[Major Shaitan Singh]

PLA K-157 "Wild Boar" pr.971 AKULA-II in Motovka Gulf. Northern Fleet, June 1998 (Photo by Ilya Kurganova,http://www.submarines.narod.ru )


pr.971 / pr.971M (?) - AKULA-III (2001) - it was assumed that the project will place large-scale "second pillar" of PLA project with a more modern avionics, modified fairing container towed antenna HOOK and other construction fences logging in part of the interface with the body of PLA. At "Sevmash" project built only PLA K-335 "Cheetah". According to some sources, the official name of the project is also not changed (pr.971).

PLA K-335 "Cheetah" pr.971M AKULA-III in front of shop №50 by "Sevmash", October 1999, Severodvinsk (photo - C.Kundyvus, PO "Sevmash", http: //forums.airbase. RU ).

PLA K-335 "Cheetah" pr.971 AKULA-III in Kandalaksha Bay of the White Sea in the sea trials. Northern Fleet, July 2001 (photo by Ilya Kurganova, http://www.submarines.narod.ru )

PLA K-335 "Cheetah" pr.971 AKULA-III in the Dvina Bay. Northern Fleet, July 2001 (photo by Ilya Kurganova,:: Русский Подплав :: Энциклопедия о Подводном Флоте России :: )

pr.971I / 09719 "Irbis" - Improved AKULA (2009) - modification of PLA pr.971 for the Indian Navy (K-152 "Nerpa"). According to media reports - "with unclassified composition of avionics" export version of the SJC "Skate 3" - on the boat are no starters GSPC and SOX system. Transferred to the Russian Navy 28.12.2009 transmission PLA Navy held in India in 2012

PLA K-152 "Nerpa" pr.971I - Improved AKULA during tests of 31.10.2008 (file photo tsonyo, http://forums.airbase.ru ). PLA Chakra / K-152 "Nerpa" pr. 971I - Improved AKULA on the way to India, the end of March 2012 ( http://www.militaryphotos.net ). PLA Chakra / K-152 "Nerpa" pr.971I - Improved AKULA on the way to India, the end of March 2012 . ( http://www.militaryphotos.net ).

pr.971M - AKULA-IV (name AKULA-IV conditional.) - the project of modernization of PLA pr.971. Parent boat - K-328 "Leopard" (zav.№832), repair the modernization project of the boat is being SRH "Zvezdochka" (Severodvinsk), the contract with the Russian Defense Ministry signed 27.12.2012, the responsibility of the ship deliverer - Nicholas Clear. Modernization will affect virtually all systems - navigation, navigator, underwater acoustics, and other electronic systems, complex weapons, the main power plant turbines. As a result of these works, "Leopard" will be assigned to a generation "3+". It is planned to modernize the forces of SRH "Star" 6 PLA pr.971. 'The Leopard' arrived at CA "Zvezdochka" at the end of June 2011. Within five months, was made the bulk of the work on the inspection of the material part of the submarine. At the end of April 2012, the ship was raised on a solid foundation. In the dock was completed on the inspection of the docking, clean housing, unloaded inhibitor. Two weeks after the docking operation "Leopard" has taken its place in the shed and the ship turned intensive work on dismantling the equipment. Complete unloading of the equipment is planned for June 2013. As of the beginning of April 2013, CA "Star" there is not a full set of design documentation, which the designer was to provide a shipyard six months ago. RKD absence hinders the development of processes for dismantling and repair ( source ). 02.13.2014 was reported that in 2015 a modernized PLA "Leopard" is planned to transfer the Russian Navy, while also notes that the works are behind schedule due to delays RKD. Following the first PLA modernization is planned there is still one from the Northern Fleet submarines and two submarines to the Pacific Fleet.

 

[Major Shaitan Singh]

PLA pr.971 projection from the booklet SPMBM "Malachite" with interior IMDS-2011 (from the archive Gogs, Форумы Balancer'а ).Projections options pr.971 PLA (Figure Diletant2010, corrections, version 29.04.2010 Mr. ).

Status : the Soviet Union and Russia
- 1987 January - the first starts CBRC "Garnet" with the head of PLA pr.971 K-284.

- 1988 - at the head of PLA K-284 after the modifications adopted by the SJC CIM-540 "Skate 3".

- 1990 - completed the test head submarines K-284 and all systems pr.971. - 1990 April 6 - dive submarines K-480 (future "Leopard") for the maximum depth of over 400 m (Norwegian Sea).

- Summer 1990 - the first combat service PLA pr.971 - Pacific Fleet, 45th Division submarine submarines K-322 - senior campaign deputy division commander captain Sidenko Konstantin Semenovich. Duration tracking foreign submarines in the campaign has been more than 14 days (354 hours). It was the best result - time tracking foreign submarines exceeded the best achievements of the Soviet Navy submarines. Including through a system of SOX.

- 1990 - the second combat service PLA pr.971 - Pacific Fleet, 45th Division submarine, submarines K-263, commanded by Captain 1st Rank Alexei Mishin Zhukovsky. It was the first and last combat service PLA K-263 - further perfected on PLA combat training crews connection. Since 1998, the PLA stands next to the PLA in the "sludge."

- Summer 1991 - the third combat service PLA pr.971 - Pacific Fleet, 45th Division submarine, submarines K-391 - a senior campaign deputy division commander captain Sidenko Konstantin S. .. Results of tracking foreign submarines better than in the first combat duty PLA pr.971.

- 1992 - military service PLA pr.971 K-331 (PF, 45th division of submarines, a senior campaign - deputy division commander captain Sergei Vasin Ye). Set a new record for the Russian Navy tracking foreign submarines.

- 1993 - on PLA K-391 (head number 514) is made in the last Navy missile shooting complex "Pomegranate", a senior on board Rear Admiral Y. Kirillov

- Spring 1995 - K-419 "Walrus" (Head. №516) during military service solved problems in remote areas of the Pacific Ocean off the western coast of the United States. Senior campaign - the division commander, Rear Admiral Sidenko KS PLA acted in a rigid system of anti-submarine warfare by the PLC US. Hike partly wore demonstrative character. It was the first contact with the US NAVY PLA Improved AKULA (K-419 "Walrus"), which showed that at a speed of less than 9.6 kt support PLA ASW sonar impossible (Jeremy Boord, Admiral, Chief of Operations US NAVY).

- 1996 - the last year for which the PLA K-317 "Patnera" launched last power plant in operation, the main turbine generators.
- 1997 October 6 - unfinished PLA "Lynx" (Head. №837) removed from the building at "Sevmash" and excluded from the Navy.

- 1997 - the Pacific Fleet from the 45th Division submarine boats pr.971 transferred to the 10th Division protivoavianosnuyu submarines of the Pacific Fleet.

- 1997 - HEAD TO PLA-335 "Cheetah" more than 80%, there is information about recycling of PLA zav.№№520 and 521.
- 1998 January 22 - unfinished PLA "Cougar" (factory №836) removed from the building at "Sevmash" and excluded from the Navy.

- 1998 September 11 - on submarines K-157 "Wild Boar" Kuz'minykh sailor killed eight fellow soldiers and wounded officer. Sailor shot special group of FSB during the storming of the compartment in which he tried to barricade themselves, threatening to blow up the rocket.

- 1998 - PLA K-328 "Leopard" Northern Fleet made a long march which resulted in the PLA commander Captain First Rank S.V.Spravtsevu awarded the title Hero of the Russian Federation. - September 1999 - on PLA K-317 "Panther" Northern Fleet delivered to Severodvinsk in tow rescue ship "Admiral Chiker" for routine supportive reconditioning.

- 2000 January 29 - on submarines K-461 "Wolf" in the sea during a storm washed overboard two officers who tried to solve the problem.Could not be saved.

- 2000 beginning of the year - of 24 submarine division SF Russian submarines K-317 "Panther" K-461 "Wolf" K-328 "Leopard" K-154 "Tiger" K-157 "Wild Boar" K-335 "Cheetah". PLA K-480 "Ak Bars" is in Gadzhiyevo sludge in the division.

From left to right - PLA K-317 "Panther" and PLA K-154 "Tiger" at the wall by "Sevmash", Severodvinsk. 2000-2001, (File photo Curious,http://forums.airbase.ru ).
- 2000-2005, - Hull structures PLA "Cougar" and "Lynx" (factory №№ 836 and 837, as well as software №838 "Sevmash") at the suggestion of leadership, "Sevmash" used in the completion of SSBN pr.955 "Yury Dolgoruky" (according to an interview Kovalev in the film "Submarine Squadron" Sevmash ", 2006).

Use of hull structures PLA №№836 and 837 "Sevmash" for the construction of SSBN "Yury Dolgoruky" pr.955 . The bottom image - unit turbine and reactor (Stills' Underwater squadron "Sevmash". Studio "Sevmashfilm", 2006)

- 2001 - PLA "Cheetah" Navy commissioned by the use of the software "Sevmash" own funds in the amount of 542 million. Rubles. At the same time in state budgets in 2001-2002 funds to repay the debt was not provided. May 2002, the company repaid the debt was not in spite of the order of the Government of the Russian Federation of 26.12.2001 ( source ).
- 2002 - after a long break of PLA K-295 "Samara" (Head №517) under the command of Captain 1st Rank Chuvasheva Viktor goes on combat duty in the Pacific. Senior campaign - deputy division commander captain Alexander K. Zaika. PLA returned from the campaign, losing part of the fairing sonar system as a result of a collision with an unidentified submerged object.

- 2002 October 1 - is excluded from the fighting strength of the PLA Navy K-480 "Ak Bars" and placed onto the sludge in Saida Bay (Northern Fleet).

- 2004 January - signed a contract with India for the completion of the modernization of the PLA pr.971I (K-152 "Nerpa") for subsequent sale in the lease for 10 years. In the Indian Navy submarines to get the name of the INS "Chakra".

- In 2005-2009 - PLA pr.971 and modifications are based in the Bay Yagelnaya (Northern Fleet) and Krasheninnikov Bay (pos.Rybachy, Pacific Fleet).

- 2 November 2006 - in Severodvinsk at "Sevmash" during repairs on submarines K-317 "Panther" because of the negligence of welders caught fire cabling and fire in the third compartment. PLA restored and post-secondary repair and overhaul (upgraded avionics and SJC) came into operation January 28, 2008

- 2007 - the willingness of PLA K-152 "Nerpa" (factory №518) 86.5%, nuclear reactor loaded on PLA in 1998. Social protest is - the Pacific Fleet - PLA "Samara" and "Kuzbass" (the rest either repair or in reserve, or sludge), the Northern Fleet - "Cheetah", "boar", "Leopard", "Tiger" (the other - similar to PF).

 

[Major Shaitan Singh]

PLA K-152 "Nerpa" pr.971I Improved AKULA goes on trial in the waters of the GCC g.Bolshoy Stone (outfitting base "Amur CVD") from the transport dock "Zeya", July 2008 (photo A.Silkin , http: / /media.photobucket.com ) By SSGN-222 pr.661 - PAPA between PLA K-480 "Ak Bars" and pr.971 missile cruiser "Admiral Nakhimov" at the wall PO "Sevmash" in Severodvinsk, photo not later than 2008 (Air-defense.net - La communauté sur la défense et l'aéronautique ).

- 2008 November 8 - on submarines K-152 "Nerpa" in trials in the Sea of Japan as a result of abnormal operation of fire extinguishing system in the nose compartment, killing 20 people.

- 2008-2009, - In the Russian Navy submarines pr.971 12, 6 pcs in the Northern Fleet and the Pacific Fleet. - 2009 May 11 - during a visit by Russian Prime Minister Vladimir Putin at the Amur CVD was examined unfinished housing factory №519 ("Irbis "). Stated that the body has a "stack" is the equipment, there is no order to the PLA Navy.

Housing and screw submarine pr.971I factory №519 in the shop №19 Amur CVD in Komsomolsk-on-Amur, May 11, 2009 (http://premier.gov.ru )

- 10-27 July 2009 - PLA "Nerpa" (K-152) pr.971I re-entered the sea trials (p.Bolshoy Stone, PF).

PLA K-331 "Magadan" parade in Vladivostok on the Day of the Navy of 26.07.2009 ( Форумы Balancer'а ).

SSBN "Sts" PR.667BDR and submarines K-480 "Ak Bars" pr.971 the wall SRH "Star" in anticipation of cuts. Severodvinsk, Summer 2009 ( http://maillist.ru/archives ).
- 2009 September - PLA "Nerpa" (K-152) pr.971I successfully completed the third phase of sea trials. - 2009 December 28 - PLA "Nerpa" K-152 adopted in the Pacific Fleet of the Russian Navy. The ceremony was held at the receiving ship p.Bolshoy stone in the territory of the GCC "East". Transfer PLA India scheduled for 2010

PLA K-480 "Ak Bars" pr.971 on SRH "Star" on disposal. Probably shot 2009 (montage of images from the archive alex1976,http://forums.airbase.ru ).

- 2010 February 19 - at the shipyard "Zvezdochka" (Severodvinsk) on disposable PLA K-480 "Ak Bars" caught fire. Fire eliminated.Apparently, when you dispose of PLA K-480 "Ak Bars" (factory №821) at the shipyard "Star" boat butchered up shells hull, lightweight body and offal disposed of, and the shell of the pressure hull transferred to the PO "Sevmash" for use during the construction of the 3rd Corps SSBN pr.955 .

PLA K-295 "Samara" parade in Vladivostok on the Day of the Navy of 25.07.2010 ( Форумы Balancer'а ).

- 2010 August 20-26 - PLA pr.971 AKULA attempt to remove an acoustic portrait of Vanguard class SSBN leaving the Royal Navy base Faslane. To protect the SSBN class submarines was sent Trafalgar.

 

[Major Shaitan Singh]

PLA K-335 "Cheetah" pr.971, Gadjievo, December 2010 (photo - Rustem Adagamov, Журнал Другого ). PLA K-461 "Wolf" pr.971, Gadjievo, December 2010 (photo - Rustem Adagamov, Журнал Другого ).

- 2011 September - PLA K-154 "Tiger" wound up in the dock shipyard №10 "Nerpa" to undergo scheduled maintenance. - November 2011 - at the shipyard "Star" arrived submarines K-328 "Leopard" for pr.971 transmission medium repair and modernization of equipment. - 2011 February 28 - contracted WF / 1/2/0216 / GK-11-DGOZ between the Ministry of Defense of Russia and CA "Star" on the repair order pr.971 ( ist. - Annual Report for 2011 ). - 19 January 2012 - in the media reported had taken place, the fire 14.01.2012 vapor alcohol liquids on PLA K-335 "Cheetah" pr.971M AKULA-III, be inspected at the shipyard №10 in Alexandrovsk (Murmansk region). Fire allegedly occurred in the 4th compartment submarines, no casualties. On the same day - 19.01.2012, the - this information corrected head of the press service of the Western Military District Andrei Bobrun - January 14 "Cheetah" while working in the inner room ignited crashed nominal lamp portable lighting. According to the instruction immediately included extinguishing system Loch (boat bulk chemical), fire extinguished without casualties and material damage. No damage to the ignition of the bulb has not led, so the incident, according to Bobrun, is not classified as a fire or fire. The crew of "Cheetah" continues to work according to plan.

The incident took place on January 14 in the village of Gadzhiyevo, not in the waters of the 10th SRH, as previously reported by the media. After returning from a campaign, during which the boat had problems with those at the 4th (reactor) compartment in the cubicle auxiliary equipment with two reversible converters (reversible transducer - electric machine that converts one type of current in the other), showed a reduction in insulation resistance. Boat crew to remove comments written notice to recall the factory warranty brigade, which experts together with divers under existing guidance documents planned work and started to implement it. When carrying out maintenance work on one of the converters during his dry one member of the factory team dropped nevzryvopozharobezopasnogo portable lamp performance, light broke, emerged as a result of sparks was instantaneous ignition of vapors of alcohol-acetone mixture - the working fluid, which was carried out with the help of drying electric machines. Cotton vapor led to a fire in a compartment, but caused by the automatic operation of the system volume fire Loch. The flash vapor also caused mild trauma specialist plant, which go to the hospital only at the insistence of the shipyard management - were bloated left hand and left cheek. After ambulatory care worker has been released ( http://flotprom.ru ).

PLA K-328 "Leopard" pr.971 comes to CA "Star", Severodvinsk, April 17, 2012 (photo - Oleg Kuleshov,http://kuleshovoleg.livejournal.com ).

PLA K-328 "Leopard" pr.971 repair in the docking chamber CA "Star", Severodvinsk, summer 2012 ( http://zvezdochka-ru.livejournal.com).

PLA K-328 "Leopard" pr.971 repair in the docking chamber CA "Star", Severodvinsk, July 2012 ( http://zvezdochka-ru.livejournal.com ).

PLA K-335 "Cheetah" pr.971 AKULA-III, presumably autumn 2012 (file photo tsonyo, http://forums.airbase.ru ).

- 2012 December 27 - in the media reported that the CA "Star" in 2012 signed a contract with the Russian Ministry of Defense to repair two PLA pr.971 - the first PLA "Leopard" (zav.№832) already enrolled in the CA " Star "in November 2011. In the future, repair and upgrade to CA" Star "is scheduled for all front-line boats of the project - including and from the Pacific Ocean. Also in December 2012, the CA has signed a contract for the repair of all types of titanium submarines "Barracuda" - working with them is planned to conduct a workshop №10 after his conversion. Note - the program repair the Pacific PLA pr.971 on CA "Star" means that the Far Eastern shipbuilding and ship repair yards (Amur CVD SRH "Star") will not be loaded in this work.

 

[Major Shaitan Singh]

PLA K-335 "Cheetah" pr.971 AKULA-III in the floating dock PD-50 on SRH-82, January 2013 (file photo avsky, http://forums.airbase.ru ).

- 2013 March 27 - Russian Defense Minister Sergei Shoigu during a visit to the Kamchatka visited standing in the floating dock of the BAP-71 "Northeast repair center" ("SVRTS" g.Vilyuchinsk) nuclear submarine pr. 971 "brotherly", which is under repair since 2007. From 2008 to repair submarines "Bratsk" has been allocated more than 250 million rubles, but the repair has not been started. Not even done an inventory of the upcoming repairs. On the boat contained on duty crew of 37 people. Earlier it was planned to complete the repair and vysvesti boat mooring trials in December 2012. Now SRH offers to modernize boats valued can be found only billions of rubles. As a result, in the summer of 2013 the PLA "Bratsk" will be sent for repair to other SRH ( source ).

PLA K-391 "Bratsk" pr.971 dock SVRTS in Vilyuchinsk, September 2013 ( http://zvezdochka-ru.livejournal.com ).
- 2013 08 October - in July and August 2014 is planned to transfer submarines K-391 "brotherly" and K-295 "Samara" pr.971 with the Pacific Fleet in Severodvinsk on CA "Star". Translation boats will be carried out by the Northern Sea. Boats will average repair with deep modernization ( source ). Just in 2014 to CA "Star" will go on repair of submarines "Wolf". Transportation Pacific boats will be performed with the help of the ship dock. Talks with the company "Dockwise" conducted. Charts feed dock compatible. By August next year, you must complete the sealing body "brotherly" - this ship is already very long period of time is in the floating dock. NS "Samara" - afloat, her need to perform work on the translation of the main power plant in the nuclear safe condition. In early August, in Avacha Bay Petropavlovsk-Kamchatsky, the two ships will be delivered on the deck of the ship dock, which the Northern Sea Route will take them into the waters of the "star". This transition will take about three weeks ( source ).

PLA K-263 "Barnaul" pr.971 in FEP "Zvezda", 2012-2013 ( Добро пожаловать в журнал Ростовского Орла ). submarine K-391 "brotherly" and K-461 "Wolf" at the wall SRH "Star", December 2014 ( http: //zvezdochka-ru.livejournal .com / ).

Export:
India:
- 2004 January - signed a contract with India for the completion of the modernization of the PLA pr.971I (K-152 "Nerpa") for subsequent sale in the lease for 10 years. In the Indian Navy submarines to get the name of the INS "Chakra".

- 2007 August 15 - the planned deadline PLA pr.971I customer (announced in 2004). Detained for 10 months with an increase in the prices of lease (10 years) to 785 million USD (the customer refused to co-pay, the starting price probably 650 million USD).

- 2008 June 15 - the second scheduled date of delivery to the customer pr.971I PLA (on lease for 10 years for 650 million. USD).

PLA K-152 "Nerpa" pr.971I in Bolshoi Kamen. Probably in 2008 ( source , photo processed).
- 10-27 July 2009 - PLA "Nerpa" (K-152) pr.971I re-entered the sea trials and successfully passed their (p.Bolshoy Stone, PF).

- 2009 December - the third scheduled deadline PLA pr.971I customer. - 2009 December 28 - PLA "Nerpa" K-152 adopted in the Pacific Fleet of the Russian Navy. The ceremony was held at the receiving ship p.Bolshoy stone in the territory of the GCC "East". Transfer PLA India scheduled for 2010. In the media indicate the following terms of the lease - "rent for 10 years worth 650 mln. USD)". - 2010 03 February - according to media reports the transfer of Indian submarine K-152 "Nerpa" to be held the end of June 2010 - 2010 August 24 - representative of the headquarters of the Pacific Fleet, said that the transfer of the PLA "Nerpa" India will take place in late 2010 - 2010 01 October - the transfer of PLA "Nerpa" India moved to the 1st quarter 2011. Currently, the PLA is trained Indian crew. According to media reports PLA transmitted India for rent for 10 years for 650 million. USD ( if it is not the fault of the media ). - 7 October 2010 - General lirektor "Rosoboronexport" Anatoly Isaykin said that the transfer of the PLA "Nerpa" India will be held as planned - i.e. the end of 2010 - 2011 October 4-5 - in Moscow during the work of the intergovernmental commission agreed to the terms of acceptance tests and acceptance of Indian Navy submarines. Exit to the acceptance tests nak Otori planned to test weapons systems is scheduled for 30.10.2011 Acceptance of boats Indian Navy is expected on 22-23 November 2011 - 30 October 2011 - PLA "Nerpa" did not come out in the sea to the test - no release date called. but there is information about his transfer. Just released information that the reliability of the weapon systems of the boat during the test shall not exceed 35%.

Transfer period PLA India as well probably will be transferred. - 2011 December 30 - in the General Staff of the Russian Navy signed a deed of assignment of India PLA K-152 "Nerpa" pr.971I leasing. In the 20 days of January 2012 the boat will go to India. - 19 January 2012 - the period of the planned transfer of submarines K-152 "Nerpa" Indian Navy. 16.01.2012, the announcement of the postponement of January 23 of 20112 - 2012 January 23 - PLA K-152 "Nerpa" pr.971I transferred to the Indian Navy in the factory "Star" in g.Bolshoy Stone. The name of the boat in the Indian Navy - Chakra. - 2012 February 10 - before the specified date PLA Chakra (K-152 "Nerpa") will depart from Vladivostok to the place of permanent deployment - to the base Vizakhapatnam on the east coast of India.

PLA Chakra / K-152 "Nerpa" pr.971I - Improved AKULA on the way to India, the end of March 2012 ( http://www.militaryphotos.net ).

- March 30-31, 2012 - estimated time of arrival of PLA Chakra (K-152 "Nerpa") to the base of Visakhapatnam on the east coast of India (21.02.2012 g). - 4 April 2012 - was officially entered in the PLA operation of the Indian Navy.

PLA Chakra / K-152 "Nerpa" pr.971I - Improved AKULA in the Indian Navy, 2013-2014 gg photo ( kuleshovoleg ).

- 2013 March 12 - with reference to the representative of the Russian military-industrial complex media reported that India is ready to finance the completion of the second PLA pr.971I - "Irbis" (zav.№519) - GCC at the Amur (Komsomolsk-on-Amur) with subsequent transfer of the Indian Navy. Durable hull is ready and is in storage at the Amur CVD. - 2014 December 17 - the newspaper Times of India reported that the Indian Navy decided to purchase in leasing in Russia in the second PLA pr.971. Register PLA pr.971 and modifications ( data is continuously refined, sortirovaka date of launching, on 02.13.2014, the version):

Please do let me know If I have missed some information and Please share your Comments

@anant_s @kaykay @vostok @Tshering22 @Agent Smith @xuxu1457 @kaku1 @Zarvan @OrionHunter @CONNAN @Hindustani78 @Ind4Ever @Stephen Cohen @WebMaster @WEB CONSULTANTS @webxeon @Capt.Popeye @Captain Maverick @500 @TankMan @Water Car Engineer, @Frosty, @aazidane, @ptldM3, @Sinopakfriend, @definitelynotIndian, @Srinivas, @Bill_Maher, @Rizwan Qayyum, @waz, @timetravel, @The Pakistani, @Kyle Sun, @Tractor, @Kinetic, @IND151, @Sunan, @third eye, @zeeshanvita, @egolfs, @sahaliyan, @Marxist, @bhagat, @Devilduck, @NMTD, @Ahmed Eid, @war is peace, @Psychic, @na088, @Khalid Newazi, @Razia Sultana, @Border Defender, @HariPrasad, @Mustang06, @ManavKalia, @Beast, @70U63, @whitefox011, @nik141991, @Shoaib Rathore, @AndrewJin, @Brahma Bull, @Rafael, @Navigator, @SecularNationalist, @danish @Saleem, @hinduguy, @Djinn, @Bang Galore, @hans @migflug @babbar
@SvenSvensonov, @vsdave2302, @Echo_419, @ayesha.a, @Kinetic
@gambit, @Storm Force ,@ptltejas, @The Great One, @PARIKRAMA, @Czar786, @Superboy, @Viper0011., @LittleFish, @sicsheep, @kṣamā, @definitelynotIndian, @gslv mk3, @45'22', @Shinigami @MilSpec
@Manticore, @Gabriel92, @Georgeclark, @Shotgunner51, @Ivan, @Speeder 2
@AgentOrange, @Superboy, @Steakhouse, @NKVD
@Umair Nawaz, @manishmaithani, @Dash, @Soumitra
@Raje amar, @Dadagiri, @Omega007, @kahonapyarhai
@hkdas, @sathya, @UKBengali, @#hydra#
@Srinivas, @jaiind, @Screambowl, @Abingdonboy
@mauka, @The_Sidewinder, @The BrOkEn HeArT
@deckingraj, @DeathInvader, @Guynextdoor2

 

[Major Shaitan Singh]

In Shot

 

[Major Shaitan Singh]

A sight to behold: Indian Navy’s nuclear submarine on a trial run off the Visakhapatnam coast

It is interesting to see different countries subs torpedo room.

USA

British

French Scorpion

Old German sub

 

[Major Shaitan Singh]

INS Chakra's control room and torpedo room during upgrade..

 

[Major Shaitan Singh]