Cakra-class submarine

KRI Cakra (401)
Class overview
Name	Cakra class
Builders	Howaldtswerke-Deutsche Werft
Operators	Indonesian Navy
Preceded by	Whiskey class
Succeeded by	Nagapasa class
Built	1977–1981
In commission	1981–present
Completed	2
Active	1
Lost	1
General characteristics
Type	Attack submarine
Displacement	1,285 tons surfaced [1] 1,390 tons submerged
Length	59.5 m (195 ft 3 in)
Beam	6.2 m (20 ft 4 in)
Draft	5.4 m (17 ft 9 in)
Propulsion	4 x MTU 12V493 AZ80 GA31L diesel engines rated at 1.8 MW (2,400 hp) [1] 4 x Siemens alternators rated at 2,300 hp (1.7 MW) 1 x Siemens motor rated at 3.4 MW (4,600 hp) 1 x shaft
Speed	11 knots (20 km/h; 13 mph) surfaced [1] 21.5 knots (39.8 km/h; 24.7 mph) submerged
Range	8,200 nmi (15,200 km; 9,400 mi) at 8 kn (15 km/h; 9.2 mph)
Endurance	50 days [1]
Test depth	240 m (790 ft) [1]
Complement	33
Sensors and processing systems	Signaal Sinbad weapons control system [1] Thomson-CSF Calypso, I-band surface search radar Atlas Elektronik CSU 3-2 active/passive search and attack sonar PRS-3/4 passive ranging
Electronic warfare & decoys	ESM : Thomson-CSF DR2000U [1]
Armament	8 × 533 mm (21 in) bow tubes [1] 14 x AEG SUT torpedoes

The Cakra class (Cakra read "chakra" which is a Sanskrit derived word referring to "wheel") is a class of two Type 209/1300 attack submarines developed by Howaldtswerke-Deutsche Werft of Germany that were bought and commissioned by the Indonesian Navy in the 1980s. The second member of the class, KRI Nanggala sank in 2021 with all hands during an exercise. The lead submarine, KRI Cakra, remains in service.