ROKS Jeong Ji (SS-073)

	Sohn Won-yil-class submarine
History
South Korea
Name	Jeong Ji ; (정지);
Namesake	Jeong Ji
Builder	Hyundai
Laid down	2004
Launched	13 June 2007
Acquired	28 November 2008
Commissioned	2 December 2008
Identification	Pennant number: SS-073
Status	Active
General characteristics
Class and type	Sohn Won-yil-class submarine
Displacement	1,690 t (1,660 long tons) (surfaced); 1,860 t (1,830 long tons) (submerged);
Length	65 m (213 ft 3 in)
Beam	6.3 m (20 ft 8 in)
Draught	6 m (19 ft 8 in)
Propulsion	Diesel-electric, fuel cell AIP, low noise skew back propeller
Speed	12 knots (22 km/h; 14 mph) surfaced; 20 knots (37 km/h; 23 mph) submerged;
Range	12,000 nmi (22,000 km; 14,000 mi) (surfaced); 420 nmi (780 km; 480 mi) at 8 knots (15 km/h; 9.2 mph) (submerged); 1,248 nmi (2,311 km; 1,436 mi) at 4 knots (7.4 km/h; 4.6 mph) (submerged);
Endurance	84 days
Test depth	nearly 400 m (1,300 ft)
Complement	5 officers + 22 crew
Armament	8 × 533 mm (21.0 in) torpedo tubes; 4 Sub-Harpoon missile-capable;

ROKS Jeong Ji (SS-073) is the second boat of the Sohn Won-yil-class submarine in the Republic of Korea Navy. She is named after the general, Jeong Ji.

Design

There are media reports that the Sohn Won-yil is equipped with eight 533 mm torpedo tubes, and that South Korea will mount a Korean Tomahawk missile, Hyunmoo-3, with a range of 500 km. It is said that they are also developing versions with a range of 1000 km and 1500 km, but there was no confirmation of whether this version could be mounted on a 533mm torpedo tube. Originally, the American Tomahawk missile was conceptually designed to be launched from a 533mm torpedo tube. Korea has also recently succeeded in localizing it.

The Cheonryong missile with a range of 500 km has been installed in the Sohn Won-yil-class and has been deployed and is in operation.^[1]

Germany, which exported the Sohn Won-yil-class (

Type 212 submarine that uses the same AIP system

with the same displacement. It has a range of 20 km, and is equipped with four 533 mm torpedo tube, and is capable against air, surface, and submarine targets.