🇮🇳 INS Machilipatnam 2026: Launch, Features, Significance and Important MCQs
Machilipatnam (BY 529), the seventh Mahe-class Anti-Submarine Warfare Shallow Water Craft being constructed by Cochin Shipyard Limited for the Indian Navy, was launched at Kochi on 29 July 2026. The vessel has been named after Machilipatnam, the historic port city in Krishna district of Andhra Pradesh. It is designed to detect and counter underwater threats in coastal and shallow waters. The vessel also represents India's growing indigenous warship-building capability, with the project containing more than 80% indigenous content.
The latest official Ministry of Defence announcement states that Machilipatnam (BY 529) was launched on 29 July 2026. Launching is not the same as commissioning. Until an official commissioning announcement is issued, students should not write that the ship entered active naval service on that date.
Why is Machilipatnam in the News?
Cochin Shipyard Limited launched the seventh vessel of its eight-ship Anti-Submarine Warfare Shallow Water Craft project on 29 July 2026. The vessel was launched by Mrs Goolrukh Anand in the presence of Vice Admiral Atul Anand, Additional Secretary, Department of Military Affairs.
Senior officials of the Indian Navy, Southern Naval Command and Cochin Shipyard Limited attended the ceremony. The launch marked another major stage in India's programme to develop specialised coastal anti-submarine warfare vessels through domestic shipbuilding.
Machilipatnam is the seventh of eight Mahe-class vessels being constructed by Cochin Shipyard Limited for the Indian Navy. Its official yard number is BY 529.
INS Machilipatnam: Quick Information Table
| Particular | Important Information |
|---|---|
| Current official name | Machilipatnam (BY 529) |
| Yard number | BY 529 |
| Class | Mahe class |
| Type | Anti-Submarine Warfare Shallow Water Craft |
| Builder | Cochin Shipyard Limited |
| Built for | Indian Navy |
| Position in the CSL series | Seventh of eight vessels |
| Keel-laying date | 29 January 2025 |
| Launch date | 29 July 2026 |
| Launch location | Kochi, Kerala |
| Named after | Machilipatnam, Krishna district, Andhra Pradesh |
| Indigenous content | More than 80% |
What is ASW SWC?
It is a specialised surface warship designed to search for, detect, track and counter hostile submarines operating in coastal and shallow waters. These waters are often difficult for large warships because of limited depth, congested maritime traffic and complex underwater conditions.
Meaning of the Term
- Anti-Submarine Warfare: Operations conducted to detect, track and counter enemy submarines.
- Shallow Water: Coastal waters with comparatively limited depth.
- Craft: A vessel designed for specialised naval operations.
Machilipatnam is not a submarine. It is a surface warship that operates above water and detects submarines beneath the water.
Main Roles of Machilipatnam
1. Anti-Submarine Warfare
The vessel is designed to detect and track hostile submarines operating near India's coastline, naval bases and harbour approaches.
2. Underwater Surveillance
Its sonar systems help the Navy identify underwater objects, submarine movements and other possible subsurface threats.
3. Low Intensity Maritime Operations
Low Intensity Maritime Operations, commonly written as LIMO, include limited maritime-security operations that do not amount to a full-scale naval war.
4. Mine-Laying and Mine-Warfare Operations
The vessel can support operations involving naval mines in strategically important coastal waters and maritime routes.
5. Coastal Defence
It will strengthen the protection of ports, naval bases, coastal installations and important sea lanes close to the Indian coast.
6. Maritime Domain Awareness
Maritime Domain Awareness means having a clear understanding of ships, submarines and other activities taking place in the maritime environment. Machilipatnam will contribute to improved surveillance and situational awareness.
Technical Specifications
| Feature | Specification |
|---|---|
| Length | 78 metres |
| Width | 11.36 metres |
| Draught | About 2.7 metres |
| Displacement | About 900 tonnes |
| Maximum speed | 25 knots |
| Endurance | 1,800 nautical miles |
| Major underwater sensors | Hull-Mounted Sonar and Low-Frequency Variable Depth Sonar |
25 knots is approximately 46 kilometres per hour.
1,800 nautical miles is approximately 3,334 kilometres.
What is SONAR?
SONAR stands for Sound Navigation and Ranging. It uses sound waves to detect and study objects under water.
A sonar system transmits sound waves into the water. When the sound waves strike an underwater object, part of the sound returns as an echo. By studying the echo, naval operators can estimate the object's distance, direction and movement.
Hull-Mounted Sonar
Hull-Mounted Sonar is fitted to the lower portion of the ship's hull. It helps scan the underwater area surrounding the vessel.
Low-Frequency Variable Depth Sonar
Variable Depth Sonar can be operated at different depths. This improves detection when underwater temperature layers and other ocean conditions interfere with the movement of sound waves.
RADAR = Radio waves
SONAR = Sound waves under water
Why Was the Ship Named Machilipatnam?
The vessel has been named after Machilipatnam, the historic port city in Krishna district, Andhra Pradesh. Machilipatnam is situated along India's eastern coast and has a long maritime and commercial history.
Historically, the port was connected with international trade, textiles and maritime activity along the Bay of Bengal. Naming the vessel Machilipatnam honours the city's maritime heritage and its historical relationship with India's eastern seaboard.
APPSC Connection
- Machilipatnam is the headquarters of Krishna district.
- It is a historic port city on India's eastern coast.
- It is associated with the Bay of Bengal.
- The topic connects Andhra Pradesh history with defence current affairs.
- It is useful for APPSC Group-I, Group-II, Police and other State examinations.
Mahe-Class ASW SWC Project
The Ministry of Defence and Cochin Shipyard Limited signed the contract for the construction of eight ASW SWC vessels on 30 April 2019.
Machilipatnam is the seventh vessel in this group. The Mahe-class vessels are designed to replace the Indian Navy's older Abhay-class Anti-Submarine Warfare corvettes.
30 April 2019
29 January 2025
29 July 2026
After Launch
To Be Announced
Atmanirbhar Bharat Significance
The Machilipatnam project contains more than 80% indigenous content. This demonstrates India's increasing ability to build technologically advanced naval platforms using domestic design, manufacturing and supply chains.
Major Benefits
- Reduces dependence on imported defence platforms and systems.
- Strengthens India's domestic shipbuilding industry.
- Creates opportunities for Indian manufacturers and MSMEs.
- Promotes the development of indigenous sonar and naval technology.
- Improves the availability of spare parts and maintenance support.
- Strengthens India's maritime security and operational readiness.
Launch and Commissioning: Do Not Confuse
| Stage | Meaning |
|---|---|
| Keel Laying | The formal beginning of the ship's major structural construction. |
| Launch | The vessel is placed in water for the first time. |
| Sea Trials | Its engines, navigation, sensors and other systems are tested at sea. |
| Delivery | The shipyard formally hands the completed vessel to the Navy. |
| Commissioning | The vessel is formally inducted into active naval service. |
29 July 2026 is the launch date of Machilipatnam. It should not be described as its commissioning date.
Related Static GK
| Static GK Point | Answer |
|---|---|
| Headquarters of the Indian Navy | New Delhi |
| Headquarters of Southern Naval Command | Kochi |
| Indian Navy Day | 4 December |
| Indian Navy motto | Sham No Varunah |
| Machilipatnam district | Krishna district, Andhra Pradesh |
| Sea adjoining the Andhra Pradesh coast | Bay of Bengal |
| Builder of BY 529 | Cochin Shipyard Limited |
| Administrative ministry of CSL | Ministry of Ports, Shipping and Waterways |
Exam Memory Trick
- M – Machilipatnam / Mahe class
- 7 – Seventh of eight CSL vessels
- 529 – Yard number BY 529
- 29 – Launched on 29 July 2026
- 25 – Maximum speed of 25 knots
- 1800 – Endurance of 1,800 nautical miles
- 80 – More than 80% indigenous content
Quick Revision Points
- Machilipatnam carries the yard number BY 529.
- It belongs to the Mahe class.
- It is an Anti-Submarine Warfare Shallow Water Craft.
- It is the seventh of eight vessels being built by CSL.
- It was launched at Kochi on 29 July 2026.
- The vessel was launched by Mrs Goolrukh Anand.
- It was built by Cochin Shipyard Limited.
- It is named after Machilipatnam in Krishna district, Andhra Pradesh.
- Its length is 78 metres.
- Its maximum speed is 25 knots.
- Its endurance is 1,800 nautical miles.
- The project contains more than 80% indigenous content.
- Its roles include coastal ASW, underwater surveillance and LIMO.
- Mahe-class vessels will replace older Abhay-class ASW corvettes.
- The launch date must not be confused with the commissioning date.
Machilipatnam (BY 529) is the seventh of eight Mahe-class Anti-Submarine Warfare Shallow Water Craft being built by Cochin Shipyard Limited for the Indian Navy, and it was launched at Kochi on 29 July 2026.
10 MCQs
Select an option to reveal the correct answer and explanation.
Machilipatnam was launched at Cochin Shipyard Limited on 29 July 2026. This was its launch, not commissioning.
Machilipatnam is a Mahe-class ASW Shallow Water Craft. The class is intended to replace older Abhay-class ASW corvettes.
These vessels are designed primarily for detecting and countering submarines in coastal and shallow waters.
CSL is constructing eight Mahe-class ASW SWC vessels for the Indian Navy. Machilipatnam is the seventh vessel in that series.
BY 529 is the official shipyard identification number associated with Machilipatnam.
Machilipatnam is the seventh of the eight Mahe-class ASW SWCs being built by Cochin Shipyard Limited.
Machilipatnam is a historic port city in Krishna district of Andhra Pradesh, situated along India's eastern coast.
The vessel has a maximum speed of 25 knots and an endurance of 1,800 nautical miles.
SONAR uses sound waves underwater. The class is designed to carry Hull-Mounted Sonar and Low-Frequency Variable Depth Sonar.
The project has more than 80% indigenous content, making it an important example of Atmanirbhar Bharat in defence manufacturing.
9–10: Excellent preparation
7–8: Very good
5–6: Revise the specifications and project details
Below 5: Read the quick-information table once again
Frequently Asked Questions
Is Machilipatnam a submarine?
No. It is a surface Anti-Submarine Warfare Shallow Water Craft designed to detect and counter submarines.
When was Machilipatnam launched?
Machilipatnam (BY 529) was launched at Kochi on 29 July 2026.
Has Machilipatnam been commissioned?
The latest official announcement available on 31 July 2026 records its launch. An official commissioning announcement had not yet been issued.
Why was the vessel named Machilipatnam?
It was named after the historic port city of Machilipatnam in Krishna district, Andhra Pradesh, in recognition of its maritime heritage.
Why is this vessel important for India?
It strengthens coastal anti-submarine warfare, underwater surveillance, maritime awareness and India's indigenous naval shipbuilding capacity.
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Official Sources and References
- Ministry of Defence – Launch of Machilipatnam, 29 July 2026
- PIB – Technical Specifications of Machilipatnam
- Cochin Shipyard Limited – Official Launch Release
- Cochin Shipyard Limited – Keel-Laying Release, 30 January 2025
- Ministry of Defence – ASW SWC Contract, 30 April 2019
This article is prepared for educational purposes and competitive examination revision. The ship's status should be updated after an official delivery or commissioning announcement by the Indian Navy or Ministry of Defence.
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