BNS Joyjatra

History
Bangladesh
Name	BNS Joyjatra
Builder	Wuchang Shipyard
Acquired	14 November 2016
Commissioned	12 March 2017
Identification	Pennant number: S 162
Status	In active service
General characteristics
Class and type	Type 035G submarine (modernized)
Displacement	2,110 tones (submerged)
Length	76 m (249 ft)
Beam	7.6 m (25 ft)
Draft	5.1 m (17 ft)
Depth	7.6 m (25 ft)
Propulsion	Type E390ZC-1 diesel engine, 5,200 hp
Speed	Submerged: 18 knots (33 km/h) Surfaced: 15 knots (28 km/h) Snorting: 10 knots (19 km/h)
Test depth	300 m (980 ft)
Complement	57 (10 officers)
Sensors and processing systems	Surface search radar: MRK-50 Topol (Snoop Tray) Active sonar: H/SQ2-262C Passive sonar: Chinese copy of French DUUX-5 Communication: Magnavox SATNAV system
Electronic warfare & decoys	Type 921A EW Suite
Armament	8 x 533 mm (21 in) torpedo tubes(6 in the bow and 2 in the stern) for: ET-31 (Yu-4B) anti ship torpedoes ET-40 anti submarine torpedoes [1] Naval mines in the lieu of torpedoes Carries total 14 torpedoes or 32 naval mines.

BNS Joyjatra is a Type 035G (Ming class) diesel electric submarine of the Bangladesh Navy. She is one of the first two submarines of the Bangladesh Navy, acquired in November 2016 as it sought to increase its naval power in the Bay of Bengal.

Description

Joyjatra uses Chinese H/SQ2-262C active sonar (improved Pike Jaw MG-100 sonar), a Chinese copy of the French DUUX-5 passive sonar, integrated by an ES5F integrated sonar system. The boat uses MRK-50 Topol (Snoop Tray) surface search radar, a Magnavox satellite navigation system for communications, with a Type 921A electronics warfare suite.

Joyjatra has eight 533 mm (21 in) torpedo tubes which can launch a complement of 14 heavy weight ET-31 anti-ship torpedoes and ET-40 anti-submarine torpedoes. ET-31 has a range of 15 kilometers with speed of 40 knots. ET-31 use active/passive acoustic homing guidance. ET-40  torpedo has two modes which can be launched from Model 7436 triple tube torpedo launching system. ^[1] ET-40 has 30 kilometers range with speed of 25 knots or 18 kilometers range with speed of 42 knots. ET-40 use wire guidance (fire-and-forget) ^[1] and active acoustic homing for ASW role. ET-40 can also be used against surface ship while first stage is straight run (unguided) till passive acoustic homing mode (600m acquisition range) or wake homing guidance activated. Alternatively, the boat can carry up to 32 naval mines. ^[2]

Service history

The ship was launched in 1989, serving the People's Liberation Army Navy Submarine Force from 1990 with pennant number 357. Before joining the Bangladesh Navy, the boat went through upgrade and refitting, extending its life to 2030. The upgrade included the installation of new sensors, modern computers and communication systems. Interior decoration and crew comfort also improved.

The ship was handed over to the Bangladesh Navy on 14 November 2016 at Liao Nan Shipyard in Dalian city of China's Liaoning province. ^{[3] [4]} She reached Chattogram port, Bangladesh on 22 December 2016. ^[5] She was commissioned into the Bangladesh Navy on 12 March 2017. ^{[6] [7]}

See also

• BNS Nabajatra

References

1. "Tender Specification of ET-40 Torpedo, Torpedo Based Support Equipment and Associated Accessories" (PDF). DGDP. Retrieved 26 November 2020.
2. "Bangladesh receives two refurbished Type 035 submarines from China". IHS Jane's 360. 15 November 2016. Retrieved 17 November 2016.
3. "Bangladesh Navy gets 2 submarines". The Daily Star . 14 November 2016. Retrieved 14 November 2016.
4. "Bangladesh takes delivery of two submarines from China". Yahoo News . 14 November 2016. Archived from the original on 15 November 2016. Retrieved 14 November 2016.
5. "2 submarines for Navy arrive at Ctg port". The Daily Star. 22 December 2016. Retrieved 22 December 2016.
6. "Bangladesh's first 2 submarines commissioned". The Daily Star. 12 March 2017. Retrieved 12 March 2017.
7. "Bangladesh's first submarines commissioned". Dhaka Tribune. 12 March 2017. Retrieved 12 March 2017.