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Sunday, 22 April 2018

INFOGRAPHICS #31: The People's Liberation Army Navy submarines in 2018

Written by D-Mitch 

Jin class ballistic missile submarine of the PLA Navy
In the following infographic, The People's Liberation Army Navy (PLAN) submarines in 2018, I depict all the submarines that are currently in commission with the PLA Navy (as of April 1, 2018). Currently, the PLA Navy (PLAN; Chinese: 中国人民解放军海军), operates a large number of nuclear-powered and diesel electric submarines. The Chinese ballistic missile submarine (SSBN) fleet  consists of  at least five (5) Jin class (09IV/09IVA, from now on 094/04A) SSBN  vessels (other sources mention six boats already in the class) and one Xia class (Type 092) SSBN (other sources report also a sub-variant, the Type 092G, consisting of a pair of boats) and perhaps one boat of the third generation of Chinese SSBN, the lead ship of the Type 096 SSBN (NATO:Tang-class). Therefore the total number of boats is the minimum six boats and maximum ten boats! Moreover, China operates at least four or five variants of the Type 093 (Shang class) nuclear-powered attack submarines (SSN) according to the latest reports; the initial pair of Type 093 with the old sail, the Type 093A with the new sail, the Type 093B with the small narrow hump located behind the sail, the Type 093B1 with the wider and more smooth hump and the Type 093B2 with the even smoother hump and shorter in height. The last variant could be though the Type 095 class as it is rumored that China has put in service the third generation of Chinese SSNs; the first boat of the new Type 095 SSN, and possibly one more boat already has been commissioned. In service there are also three (3) Type 091 (Han class) SSN boats, the first generation of Chinese SSNs. Therefore the number of Chinese SSNs is at least 13-14 boats, if we assume at least a pair for each variant plus the old Type 091s, either just eight (8) boats if we assume there is only one boat for each variant except the Type 091s (which is unlikely to be the case), or the real number is even bigger with the Type 095s a completely new variant in addition to the existing five Type 093 variants!

Type 093s. Source: dafeng cao
Two different Type 094 SSBN variants
The active diesel electric submarine (SSK) fleet consists of approximately 58 boats in active service! About 18 Type 039A/039B/039C SSK (Yuan class) boats (other sources mention 12 Type 039B/C boats and two other vessels in sea trials) and 13 Type 039/039G SSK boats (other sources mention 16 boats in the class). Furthermore, the Chinese Navy operates 12 Kilo class SSK, five (5) Type 035B (Ming class) SSK and about nine Type 035G old SSKs, the remaining of total 12 boats completed of which one was lost and two were transferred to Bangladesh. It is not known if they are still in active service. China operates also a sole boat of the Type 032 class (Qing-class), a diesel-electric submarine currently as a testbed in PLAN. It is said to be the world's largest conventional submarine, at a submerged displacement of 6,628 tonnes (!) and a length of about 93 meters. This impressive vessel is armed with a number of 533/650 mm torpedo tubes, 2-3 SLBM VLS in the conning tower and four (4) tube VLS for cruise/ASW/AShM missiles in the forward section! The submarine tests new technologies such as torpedoes, compartments for special forces, underwater unmanned vehicles, new missiles, and others. Take into account please that the sources vary a lot on the amounts of boats in each class and moreover on the pennant numbers of the boats (for example Wiki reports the same pennant numbers for different classes of vessels). Moreover, the new classes are illustrated according to the latest artist's impressions as well as the few existent photos.

The People's Liberation Army Navy submarines in 2018 (v.II). For a high resolution image click here.

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Wednesday, 18 April 2018

INFOGRAPHICS #30: The Russian Navy submarines in 2018

Written by D-Mitch 

Dmitriy Donskoy, the last of the Typhoon class undersea giants...
In the following infographic, The Russian Navy submarines in 2018, I depict all the submarines that are currently in commission with the Russian Navy (as of April 1, 2018). Currently, the Russian Navy (Russian: Военно-морской Флот Российской Федерации (ВМФ России), lit. Military-Maritime Fleet of the Russian Federation) operates an impressive number of powerful nuclear-powered and diesel electric submarines,. The Russian ballistic missile submarine (SSBN) fleet  consists of  four (4) Borei class SSBN (the fourth vessel and lead ship of the fifth generation Borei II-class, Knyaz Vladimir, is scheduled to enter service this year), six (6) Delta IV class SSBN, one recently overhauled Delta III class SSBN (Ryazan) and the last (and upgraded) boat of the largest ever built submarine class, the Typhoon class Dmitriy Donskoy (TK-208). Moreover, Russia operates eight (8) Oscar II class guided missile submarines (SSGN), 11 Akula I/II/III class nuclear-powered attack submarines (SSN) plus one more boat (Nerpa) which has leased to India from 2012 for 10 years (Chakra), one Yasen class SSN while one more, K-561 Kazan, is about to be commissioned this year, three (3) Victor III class boats and four (4) Sierra I/II class boats. The active diesel electric submarine fleet consists of 21 boats, all of them except one boat (Lada class B-585 Sankt Peterburg) belong to the Kilo/Improved Kilo class attack submarines. The Russian Navy maintains also a significant amount of special purpose submarines including two nuclear-powered modified Delta III/IV boats (they operate as motherships for mini submarines, for a combination of oceanographic research, search and rescue, and underwater intelligence-gathering) as well as the 90 (?) -meter Sarov and the nuclear-powered AS-12, known also as Losharik. It should be mentioned that many boats are still inactive or in modernization overhaul, so for some of them their status is unclear.

The Russian Navy submarines in 2018. For a high resolution image click here.
I would like to thank a lot my friend Artjom H for his great help, and specifically for the provision of accurate information about the number of boats and their current status in service with the Russian Navy as well as for his (really impressive) patience answering all my questions!
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Wednesday, 11 April 2018

INFOGRAPHICS #29: The United States Navy submarines in 2018

Written by D-Mitch

Ohio class SSBN of the United States Navy
In the following infographic, The United States Navy submarines in 2018, I depict all the submarines that are currently in active service with the United States Navy (as of April 1, 2018). Currently, the United States Navy operates a massive amount of powerful nuclear-powered submarines, consisting of 14 Ohio class ballistic missile submarines (SSBN), four (4) Ohio class (modified) guided missile submarines (SSGN), three (3) Seawolf class nuclear-powered attack submarines (SSN) (including the modified USS Jimmy Carter SSN-23), 15 Virginia class SSN while one more, the USS Indiana SSN-789 is about to join the fleet, 22 Improved Los Angeles class SSN, and 12 Los Angeles class SSN. Of the Los Angeles class submarines, three (3) are about to decommissioned in the near future (USS Buffalo (SSN-715), USS Olympia (SSN-717) and USS Jacksonville (SSN-699)). There will be only one vessel from the Los Angeles class Flight I & II in active service for limited time, which is the USS Bremerton (SSN-698). This year, two more Virginia class SSN are scheduled to join the fleet, the USS South Dakota (SSN-790) and USS Delaware (SSN-791). These two vessels will be the last of the Block III while a new Block IV that will consist of ten (10) boats is under construction. It should be mentioned that all the boats are nuclear-powered.

The United States Navy submarines in 2018. For a high resolution image click here.
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Tuesday, 3 April 2018

Radiated Noise Signature of Modern Diesel Submarines

Written by George Papangelopoulos
Japanese Navy Oyashio class SSK performing an
emergency main ballast blow maneuver. Photo: JMSDF
One of the best-kept secrets of submarine manufacturers and operators is the level of their subs’ signatures. As a result, related official published and open source data is mostly limited to general estimations of outdated designs from the Cold War era. The key signatures of a conventional submarine include its radiated noise, its target echo strength, its magnetic characteristics and its snort mast’s radar cross section and radiated heat. As new and more sophisticated naval mine detonators are developed, electric signatures (UEP, ELFE) are added to this list. The present article focuses on the radiated noise of modern diesel-electric submarines (SSKs), in an effort to shed some light on this interesting and highly classified subject. 

Italian Sauro class submarine emerging next to a Durand de la Penne class destroyer
Radiated noise is the total noise emitted by a submarine and can be received by hostile passive sonars. It should not be confused with sonar self-noise, although in most cases both are caused by the same sources. For example, flow noise can be an important contributor to the sonar self-noise even at low speeds, but it is only at high speeds that it becomes a significant contributor to radiated noise. 

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Sunday, 1 April 2018

Inverted-Bow Warships Back in the Aegean Sea?

Written by D-Mitch

The legendary WWI era Georgios Averof armored cruiser of the
Hellenic Navy featured an inverted bow. It is now a museum ship.
This is the introduction to an article I wrote for the well-known Navy Recognition, one of the most popular online media covering Naval Forces, Defense Industry, Naval Technology and Maritime Security. The article titled "Inverted-Bow Warships Back in the Aegean Sea? " looks at the potential return of "inverted bow warships" in the Aegean sea as the Hellenic Navy is reportedly looking closely at the  French Navy's future FTI (Frégate de Taille Intermédiaire or mid-size frigate) Belh@rra, a next generation frigate designed by French shipbuilder Naval Group. Naval Group has named its new frigate Belh@rra in reference to Europe’s only giant wave: the Belh@rra. The first “a” transformed into an @ makes reference to the highly digital nature of the frigate proposed by Naval Group! Enjoy my (long) take on the design and features of this new stealth powerful front-line digital frigate here!

Infographic of the Belh@rra frigate. The inverted bow it is her distinctive characteristic! High resolution image here.
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