The ''Sang-O'' (''Shark'') class of submarines (

Hangul The Korean alphabet, known as Hangul, . Hangul may also be written as following South Korea's standard Romanization. ( ) in South Korea and Chosŏn'gŭl in North Korea, is the modern official writing system for the Korean language. The let ...

: 상어급 잠수함) are diesel-electric coastal submarines in service with the

Korean People's Navy The Korean People's Army Naval Force (KPANF; Korean: 조선인민군 해군; Hanja: 朝鮮人民軍海軍; ''Chosŏn-inmingun Haegun''; ) or the Korean People's Navy (KPN), is the naval service branch of the Korean People's Army, which contain ...

, the navy of

North Korea North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Y ...

. They are the country's second largest indigenously-built submarines. Though North Korean military capabilities are mostly kept classified, it was reported that North Korea maintains 40 ''Sang-O''-class submarines as of February 2021.

History

The ''Sang-O''-class was introduced in 1991, produced at Bong Dao Bo Shipyards in

Sinpo SINPO, an acronym for Signal, Interference, Noise, Propagation, and Overall, is a Signal Reporting Code used to describe the quality of broadcast and radiotelegraph transmissions. SINPFEMO, an acronym for Signal, Interference, Noise, Propagation ...

. A single unit was captured by the

Republic of Korea Navy The Republic of Korea Navy (ROKN; ko, 대한민국 해군), also known as the ROK Navy or South Korean Navy, is the naval warfare service branch of the South Korean armed forces, responsible for naval and amphibious operations. The ROK Navy in ...

(

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...

) after it ran aground on 18 September 1996 in the Gangneung submarine infiltration incident. The siezed ''Sang-O''-class submarine was placed on display at Unification Park near

Gangneung Gangneung () is a municipal city in the province of Gangwon-do, on the east coast of South Korea. It has a population of 213,658 (as of 2017).Gangneung City (2003)Population & Households. Retrieved January 14, 2006. Gangneung is the economic ...

, which was opened on 26 September 2001.

Design

The ''Sang-O''-class was reported to be larger than a midget submarine, but smaller than the Romeo and Whiskey-class submarines. They're usually equipped with four 533mm torpedo tubes and 16 mines, but some are unarmed and are used to carry North Korean commandos.

New class

It was reported in March 2011 that a new version of the Sang-O class had been deployed in North Korea. Satellite imagery from 2005 suggests the Sang-O II / K-300 may have been produced at the Mayang-do naval base and fitted out at the dry docks located at 39.9978 N, and 128.20019 E. Other footage of the nearby docks of Sinp'o appear to depict the Sang-O II / K-300 as early as 2004 (at 40 01'31.20"N 128 09'55.80"E). Subsequent satellite imagery shows the Sang-O II / K-300 deployed to the Ch’aho-rodongjagu submarine Navy Base at 40.205441 N 128.649524 E on North Korea's east coast. According to the KPA Journal, the decision to develop a larger, improved version of the Sang-O came in the late 1990s or early 2000. The Sang-O II / K-300 is a stretched version of the original Sang-O class with an approximate length of 39 to 40 metres and a corresponding surface displacement of approximately 300 to 340 tons. The increased length and internal volume would suggest an increase in the operational range of the submarine and troop/equipment carrying capabilities. Top speed is also reported to be higher in the new model, meaning an improved propulsion system is possibly housed in some of the extra length.

References

Bibliography

* Submarines of the Korean People's Navy Submarine classes {{submarine-stub