Sang-O-class submarine

**Sang-O class**
	Submarine involved in the 1996 incident
Class overview
Builders	Bong Dao Bo Shipyards, Singpo
Operators	Korean People's Navy
Preceded by	Yugo class
Succeeded by	Sinpo class
Subclasses	Attack version, infiltration/reconnaissance version
In commission	1991
Completed	41+
Active	40 (February 2021)
Lost	1 captured by South Korea
Preserved	1
General characteristics (Sang-O I armed version)
Type	Coastal submarine
Displacement	275 tons (surfaced); 370 tons (submerged);
Length	34 m (111 ft 7 in)
Beam	3.8 m (12 ft 6 in)
Propulsion	Diesel-electric: 1 small diesel, 1 electric motor, 1 shaft
Speed	7.5 knots (13.9 km/h; 8.6 mph) surfaced; 9 knots (17 km/h; 10 mph) submerged;
Range	1,500 nmi (2,800 km; 1,700 mi)
Test depth	150 m (490 ft), capable of bottoming
Capacity	0 (10/11 in recce version)
Complement	15
Sensors &; processing systems	Radar; Civilian Furuno I-band radar; Passive RWR/ESM/SIGINT; Golf Ball radar; Snoop Plate radar; Sonar; Trout Cheek sonar;
Armament	4 × 533 mm (21 in) torpedo tubes fitted with Russian 53-65KE torpedoes; Capable of minelaying;
Notes	Fitted with a snorkel

The Sang-O ("Shark") class of submarines (Hangul: 상어급 잠수함) are diesel-electric coastal submarines in service with the Korean People's Navy, the navy of North Korea. 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.