Najin-class frigate

	1993 aerial port side view of a North Korean Navy Najin-class frigate underway; a hull number (531) is visible toward the bow.
Class overview
Builders	Unknown, but built in North Korea (Najin Shipyards)
Operators	KPA Naval Force
Built	1971–1979
In commission	1973–present
Completed	4+
Active	2+
Retired	2+
General characteristics
Type	Frigate
Displacement	1,600 long tons (1,600 t)
Length	328 ft (100 m)
Beam	32.8 ft (10.0 m)
Draught	8.9 ft (2.7 m)
Propulsion	2x diesels; 15,000 bhp (11,000 kW); 2 shafts
Speed	26 knots (48 km/h; 30 mph)
Range	4,000 nmi (7,400 km; 4,600 mi) at 14 knots (26 km/h; 16 mph)
Complement	180
Sensors &; processing systems	Radar; Air search: Square Tie; Surface search: Pot Head; Navigation: Pot Drum; Fire control: Drum Tilt; Sonar; Stag horn; hull-mounted active search/attack sonar;
Armament	Missiles:; SSM - two SS-N-2 Styx or SS-N-25 Switchblade; Guns; 2 × 100 mm (4 in)/56 (single); ; 4 x 57 mm (2.2 in) (twin); twelve or four 30 mm (1 in)/66 (6 or 2 twin);; 12 × 25 mm (0.98 in) machine guns (6 twin); Other:; Two RBU 1200 five-tube fixed launchers; Depth charges (two projectors, two racks); 30 mines;

The North Korean Najin-class frigates are some of the largest vessels in the Korean People's Navy.

Although they bear a striking resemblance to Soviet Kola-class frigates, they are unrelated to any Russian or Chinese design. They were built in the 1970s.

The class was originally fitted with a trainable triple 21-inch (533 mm) torpedo launcher, which was replaced in the mid-1980s with fixed P-15 Termit missile launchers taken from Osa-class missile boats. The design is inherently dangerous, and even a minor missile failure would result in significant damage to the ship.

In 2023, two or more of these frigates remain active with North Korea's navy a full half-century after they were commissioned. An estimated two or more have been retired, though what has been done with them since then is unknown.