Chinese Navy stretched KILO Class submarine
Flag A video capture posted on Chinese media on 9th September 2018 shows the Chinese Navy’s stretched Pr. 877EKM KILO Class submarine. The vessel has a hull insert approximately 15 meters long. The increased space most likely accommodates an Air Independent Power (AIP) system to increase the submarine’s stealth in littoral environments. Other possibilities include a special mission compartment or cruise missile vertical launch tubes.

China Stretched KILO class submarine - Covert shores
China Stretched KILO class submarine - Covert shores

China received two Pr. 877EKM Class submarines in 1994-5, followed by two Pr. 636 KILO Class boats in 1997-8 and 8 Pr.636M KILOs in 2004-6. The modified submarine is thought to be one of the first two Pr.887ECM boats and is based in China’s South Sea Fleet.

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China already operates AIP submarines with at least thirteen Type 039A Yuan Class boats in service. Chines AIP systems are reported to be of the Stirling type, similar in concept to those found n Swedish and Japanese submarines. It is possible however that the modified KILO has an experimental powerplant, possibly of anther form of AIP.
China Stretched KILO class submarine - Covert shores

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