Sariwon-class corvette

The Sariwon class corvette(사리원급 초계함) is a Soviet-designed corvette used by North Korea.

Aerial port side view of a North Korean Navy T-Class patrol combatant. T-8 Cheka was a Project 53 Fugas or Tral Class minesweeper built in 1938 for the Soviet Navy and transferred to North Korea in December 1953.
Class overview
Name	PG Sariwon-Class
Builders	Unknown - built somewhere in North Korea [1]
Operators	KPA Naval Force
In service	1960s
Completed	5
Active	5
General characteristics (as per Janes)
Type	Corvette
Tonnage	450 tons
Displacement	650 tons full load
Length	61.5 metres (202 ft)
Beam	7.5 metres (25 ft)
Draught	2.4 metres (7.9 ft)
Installed power	2 x diesel engines
Propulsion	conventional
Speed	16 knots (30 km/h)
Range	2,700 nautical miles (5,000 km) at 16 knots (30 km/h)
Boats & landing craft carried	One, mounted on davits in break in superstructure
Sensors and processing systems	Surface search: ? Navigational: Type 351 Radar
Electronic warfare & decoys	None - only 4 x 6lbs decoy RL
Armament	Four 57 mm/80 (2 twin); Four 37 mm/6 (2 twin); 16 14.5 mm machine guns (4 quad); Two depth charge rails; 30 RBU-1200 mines
Notes	Based on Soviet 1930s Fugas-class Tral-type minesweeper. Ships in class include: 611, 612, 613, 614, 671

The class is based on the Soviet Fugas-class Tral type fleet minesweepers, but were built in North Korea in the 1960s. It is believed five ships of this type are currently active in the Korean People's Navy.

Stationed on the east coast, these ships were likely built at either Mayang-do Naval Shipyards or Bong Dao Bo Shipyards in nearby Sinpo on the mainland.