THE FOLLOWING IS "APPROVED FOR PUBLIC RELEASE"
NOTES [Introduction]
The Type 093 (or Type 09-III, NATO codename: Shang class) is China’s 2nd-generation nuclear-powered attack submarine (SSN) introduced in the early 2000s. It represents a significant improvement over the 1st-generation submarines in performance and capability. At least six hulls have already been commissioned into the PLA Navy as of 2015, and the construction programme continues. The improved Type 093B (Shang-III class) SSGN is capable of carrying log-range cruise missiles for anti-ship and land-attack.
The PLA Navy initiated the development of its next-generation Type 093 nuclear attack submarine in the mid-1980s as a successor to its 1st-generation Type 091 (Han class). However, little progress was made until the mid-1990s, when Russia agreed to transfer its nuclear submarine technology to China in exchange for urgently-needed cash.
[Pete Comment: For 2022-24 a China-Russia barter situation may apply as the Ukraine War is running down Russian military and financial resources. China's future Type 095 SSN could be benefitting from some Russian tech (eg. Yasen) data].
The St. Petersburg-based Rubin Central Design Bureau for Marine Engineering, one of Russia’s primary centres for submarine design, offered consultation to the Type 093’s development, including overall hull design, engine and machinery quieting, combat system, weapon system, and countermeasures outfit. The existence of the submarine programme was first reported by the Pentagon in 2003. The U.S. Navy intelligence and Pentagon suggested that 2 hulls in the basic variant Type 093 and 4 hulls in the improved Type 093A variant had been constructed by 2017 ((Annual Report to Congress: Military and Security Developments Involving the People’s Republic of China, 2017, page 24.)).
While the basic variant Type 093 is only comparable to the 1970s U.S. and Russian designs such as the early variant Los Angeles (688) class and the Victor-III class, the improved Type 093A/B is believed to be approaching the later variant Los Angeles class and the Akula class in quietness and overall capability, though they still cannot match the more advanced Seawolf and Virginia class.
Type 093 Shang-I class Construction of the Type 093 reportedly began in the late 1990s at the Huludao-based CSIC Bohai Shipbuilding Heavy Industry Co., Ltd. The first-of-class Boat 407 was launched sometime in 2001 to 2002. After a sea trial that lasted for four years, the submarine was finally commissioned by the PLA Navy in 2006. The second hull Boat 408 was launched in late 2003 and commissioned around 2007. The production then stopped and replaced by the follow-up variants.
The basic variant Type 093 (Shang I class) was said to have been partially based on the Russian Victor III class in design, though the two submarines bear no resemblance in appearance. The submarine is estimated to have 6.000 to 7,000 t displacement when dived. It features a water-drop shape hull, with a pair of fin-mounted hydroplanes and four diving planes. Six (three on each side) flank-mounted sonar arrays are clearly visible on the hull of the submarine. There are six 533 mm bow torpedo tubes (4 above, 2 below), capable of carrying the various anti-submarine/surface torpedoes of wire-, acoustic- and wake-homing, as well as the YJ-82 anti-ship cruise missile (ASCM).
Type 093A Shang-II class This is an improved variant with a redesigned sail with a tapered front (similar to that of the Seawolf class and Virginia class) and all windows removed. Type 093B Shang-III class
The improved Type 093B nuclear-power guided missile submarine (SSGN) was launched in 2012 and commissioned in 2015. This variant features some redesign to the sail, with the tapered front retained but all windows removed. There is a mysterious hump located immediately behind the sail, which is believed to accommodate a missile vertical launch system (VLS). The VLS is said to be used for carrying and launching the YJ-18 ASCM, the Yu-8 rocket-propelled torpedo, and the CJ-10 land-attack cruise missile (LACM). The YJ-18, a Chinese copy of the Russian 3M-54 Klub (SS-N-27 ‘Sizzler’), is capable of attacking surface and land targets to a maximum range of 650 km. The CJ-10, rumoured to have been developed from the Russian Kh-55 (AS-15 ‘Kent’), employs a combined inertial navigation system (INS), satellite, and terrain contour matching (TERCOM) navigation to a maximum range of 1,500 km. These missiles allow the Type 093B to project power ashore over long distance – a capability not previously possessed by Chinese SSNs...