Nagapasa-class submarine

	KRI Nagapasa (403)
Class overview
Name	Nagapasa class
Builders	Daewoo Shipbuilding & Marine Engineering; PT PAL;
Operators	Indonesian Navy
Preceded by	Cakra class
Cost	$373M per vessel (Batch-1 Nagapasa-class, 2011 April); $340M per vessel (Batch-2 Nagapasa-class, 2019 December);
In commission	2017–present
Planned	6
On order	3
Completed	3
Active	3
General characteristics
Type	Attack submarine
Displacement	1,400 tons (surfaced)
Length	61.3 m (201 ft 1 in)
Beam	6.3 m (20 ft 8 in)
Draft	5.5 m (18 ft 1 in)
Propulsion	4 x MTU 12V493 diesel generators ; 3,700 kW (5,000 shp);
Speed	11 knots (20 km/h; 13 mph) surfaced; 21.5 knots (39.8 km/h; 24.7 mph) submerged;
Range	11,000 nmi (20,000 km; 13,000 mi) at 10 kn (19 km/h; 12 mph) surfaced,; 8,000 nmi (15,000 km; 9,200 mi) at 10 kn (19 km/h; 12 mph) snorkeling,; 400 nmi (740 km; 460 mi) at 4 kn (7.4 km/h; 4.6 mph), submerged;
Endurance	50 days
Test depth	500 m (1,600 ft)
Complement	more than 40
Sensors and ; processing systems	Kongsberg MSI-90U Mk 2 combat management system; Atlas Elektronik CSU-90 active and passive sonar; ELAC KaleidoScope sonar suite ; Flank sonar arrays; Pegasso RESM system; Aries radar; ECPINS-W integrating navigation and tactical systems ; L3's MAPPS integrated platform management system; Safran's Sigma 40XP inertial navigation systems; Hensoldt SERO 400 & OMS 100 periscope; ZOKA acoustic torpedo countermeasures ;
Armament	8 × 533 mm (21 in) torpedo tubes; 14 Black Shark torpedoes;

The Nagapasa class is an upgraded variant of the Jang Bogo class, also known as Improved Chang Bogo. The vessels were built by the South Korean Daewoo Shipbuilding & Marine Engineering (DSME) and the Indonesian PT PAL. As of 2021, six ships have been planned, which were divided into two batches. Batch 1 consists of three ships and all are already commissioned. Batch 2 also consists of three ships that are in the early development stage. The class is named for weapon of Indrajit, Nagapash (Sanskrit: नागपाश, romanized: nāgapāśa, lit. 'serpent rope').

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