#Kalvari Class

[thenandivaartha]

Indian Navy's Kalvari-Class Submarines to Receive Indigenous Signal Flares and Anti-Sonar Devices

[balkikhalnews]

India, France to kick off high-voltage naval exercise in Arabian Sea | India News

NEW DELHI : India and France on Wednesday will kick off their `Varuna’ naval exercise in the Arabian Sea, with aircraft carriers, other warships, submarines, fighters and helicopters taking part in intensive combat drills.India has deployed its indigenous aircraft carrier INS Vikrant among other warships and a Kalvari-class submarine for the exercise from March 19 to 22, while France has fielded…

[news365timesindia]

[ad_1] Ministry of Defence has signed two contracts, worth approx. Rs 2,867 crore, for the construction of Air Independent Propulsion (AIP) Plug for DRDO-AIP system & its integration onboard Indian Submarines, and the integration of Electronic Heavy Weight Torpedo (EHWT) onboard the Kalvari-Class submarines. Both the contracts were signed in the presence of Defence Secretary Shri Rajesh Kumar Singh in New Delhi on December 30, 2024. The contract for construction of AIP Plug and its integration was inked with Mazagon Dock Shipbuilders Limited, Mumbai worth around Rs 1,990 crore, while the contract for integration of EHWT, being developed by DRDO, was signed with Naval Group, France at an approx. cost of Rs 877 crore. The AIP technology is being indigenously developed by DRDO. The project pertaining to construction of AIP-Plug and its integration will enhance the endurance of conventional submarines and significantly contribute towards the ‘Aatmanirbhar Bharat’ initiative. It would generate employment of nearly three lakh man days. The integration of EHWT will be a collaborative effort by Indian Navy, DRDO and Naval Group, France. It would greatly augment the firepower capabilities of Kalvari Class submarines of the Indian Navy. [ad_2] Source link

[news365times]

[ad_1] Ministry of Defence has signed two contracts, worth approx. Rs 2,867 crore, for the construction of Air Independent Propulsion (AIP) Plug for DRDO-AIP system & its integration onboard Indian Submarines, and the integration of Electronic Heavy Weight Torpedo (EHWT) onboard the Kalvari-Class submarines. Both the contracts were signed in the presence of Defence Secretary Shri Rajesh Kumar Singh in New Delhi on December 30, 2024. The contract for construction of AIP Plug and its integration was inked with Mazagon Dock Shipbuilders Limited, Mumbai worth around Rs 1,990 crore, while the contract for integration of EHWT, being developed by DRDO, was signed with Naval Group, France at an approx. cost of Rs 877 crore. The AIP technology is being indigenously developed by DRDO. The project pertaining to construction of AIP-Plug and its integration will enhance the endurance of conventional submarines and significantly contribute towards the ‘Aatmanirbhar Bharat’ initiative. It would generate employment of nearly three lakh man days. The integration of EHWT will be a collaborative effort by Indian Navy, DRDO and Naval Group, France. It would greatly augment the firepower capabilities of Kalvari Class submarines of the Indian Navy. [ad_2] Source link

[jenniferlinda76]

India's Naval Force: The Role of Arihant-Class Submarines in Maritime Security

Maritime Security and Submarines of India: The Arihant Class Naval Force

India, a nation with a vast coastline exceeding 7,500 kilometers, places immense strategic importance on maritime security. The Indian Ocean, a critical conduit for global trade, demands vigilant oversight to ensure the nation's economic and defense interests. Central to India's maritime strategy is its submarine fleet, particularly the Arihant class, which significantly enhances the Indian Navy's operational capabilities and strategic deterrence.

The Strategic Imperative of Maritime Security

Maritime security encompasses the protection of sea lines of communication (SLOCs), prevention of maritime terrorism, countering piracy, and safeguarding offshore resources. For India, the Indian Ocean is not merely a route for international trade but a strategic theater where it must counter various threats, ranging from piracy to the increasing naval presence of other powers like China.

India's maritime strategy is guided by the need to secure its Exclusive Economic Zone (EEZ), which spans over 2 million square kilometers and contains rich undersea resources. The Indian Navy plays a crucial role in maintaining a balance of power in the region and ensuring a free and open maritime domain.

Evolution of India's Submarine Fleet

India's journey in developing a capable submarine fleet began with the commissioning of its first Submarines of India, INS Kalvari, in 1967. The Indian Navy's submarine force comprises conventional diesel-electric submarines and nuclear-powered submarines. Over the decades, India has developed a formidable underwater combat force capable of both defensive and offensive operations.

The Indian Navy's submarine fleet includes the Kilo-class (Sindhughosh-class), HDW Type 209/1500 (Shishumar-class), Scorpene-class (Kalvari-class), and the indigenous Arihant-class nuclear-powered submarines. These submarines serve diverse roles, from intelligence gathering and special operations to anti-submarine warfare and strategic deterrence.

The Arihant Class: India's Nuclear Deterrent

The Arihant-class submarines mark a significant milestone in India's naval capabilities. These submarines are the first nuclear-powered ballistic missile submarines (SSBNs) developed by India, forming a critical component of the country's strategic nuclear deterrent. The Arihant class ensures that India can maintain a credible second-strike capability, vital for a stable deterrence posture.

Development and Commissioning:

The development of the Arihant class began under the Advanced Technology Vessel (ATV) project, initiated in the 1980s. The project was characterized by secrecy and significant assistance from Russia, which provided technology transfer and technical expertise. INS Arihant, the lead vessel of the class, was launched in 2009 and commissioned into the Indian Navy in 2016.

Design and Capabilities:

The Arihant-class submarines draw from the Russian Akula-1 class design but are modified to meet Indian specifications. These submarines are powered by an 83 MW pressurized water reactor, enabling extended underwater endurance crucial for their stealth role as a deterrent platform.

Armed with K-15 Sagarika missiles (range of 750 kilometers) and K-4 ballistic missiles (range of 3,500 kilometers), the Arihant-class submarines can target adversaries far beyond India's borders, enhancing the strategic reach of the Indian Navy.

Operational Significance:

The primary mission of the Arihant class is to provide a secure and survivable second-strike capability. These submarines are designed to remain undetected in the vast oceanic expanse, ready to launch retaliatory strikes if necessary. This capability aligns with India's nuclear doctrine of "No First Use," ensuring a credible deterrent against its nuclear-armed neighbors.

The Strategic Role of the Indian Navy

The Indian Navy's strategic objectives include protecting India's maritime interests and asserting its influence in the Indian Ocean Region. The induction of the Arihant-class submarines underscores India's commitment to enhancing its naval capabilities and strategic deterrence.

Power Projection:

The Arihant-class submarines enable India to project power far beyond its immediate neighborhood. The ability to launch nuclear missiles from the sea provides India with a strategic advantage, deterring potential adversaries from aggressive actions. This power projection establishes India as a significant player in regional and global security dynamics.

Maritime Diplomacy:

A strong submarine force enhances India's maritime diplomacy. Demonstrating advanced capabilities allows India to engage with other maritime nations on equal footing, fostering cooperation in areas such as counter-piracy, maritime domain awareness, and joint naval exercises. This builds alliances and partnerships essential for regional stability.

Countering Regional Threats:

India faces several maritime threats, including the growing presence of the Chinese Navy in the Indian Ocean. The Arihant-class submarines address these challenges by providing India with a credible means to counterbalance regional powers' influence. Their stealth and strike capabilities ensure that India can protect its interests and maintain a strategic edge.

Future Prospects and Challenges

While the Arihant-class submarines represent a significant advancement, India continues to face challenges in further enhancing its submarine capabilities. The Indian Navy plans to expand its SSBN fleet with additional Arihant-class submarines and develop new, more advanced models.

Technological Advancements:

Future submarines are expected to feature advancements in stealth technology, longer-range missiles, and improved sensors and communication systems. These enhancements will be crucial in maintaining the effectiveness and survivability of India's underwater fleet in an increasingly contested maritime environment.

Industrial and Technological Hurdles:

Despite progress, India faces challenges in indigenous development and production capabilities. Ensuring self-reliance in critical technologies and reducing dependence on foreign suppliers remain significant obstacles. Addressing these issues will require sustained investment in research and development and collaboration with international partners.

Strategic Imperatives:

As India continues to enhance its submarine capabilities, it must also focus on broader strategic imperatives of maritime security. This includes strengthening its conventional naval forces, improving maritime domain awareness through enhanced surveillance and intelligence capabilities, and fostering regional cooperation to address shared security challenges.

Conclusion

The Arihant-class submarines mark a significant milestone in India's maritime security and strategic deterrence capabilities. As the cornerstone of India's underwater nuclear deterrent, these submarines enhance the Indian Navy's ability to protect the nation's maritime interests and project power in the Indian Ocean Region. The continued development and expansion of India's submarine fleet will be crucial in addressing evolving security dynamics and maintaining regional stability. As India navigates these challenges, the Arihant class stands as a testament to its commitment to achieving a credible and robust maritime defense posture.

[socialmediamanagers]

Exploring Indian Naval Power: Vikramaditya INS and INS Karanj

India’s maritime capabilities and naval strength are vital components of its national defense strategy. Two significant assets of the Indian Navy, Vikramaditya INS and INS Karanj, showcase the country’s commitment to maritime security, defense preparedness, and technological advancements. In this informative blog, we will delve into the history, features, and contributions of these naval vessels, highlighting their roles in safeguarding India’s maritime interests.

Vikramaditya INS: A Symbol of Naval Power

Vikramaditya INS, formerly known as Admiral Gorshkov, is a formidable aircraft carrier that underwent extensive modernization and refurbishment to join the Indian Navy’s fleet. Originally built by the Soviet Union, the carrier was commissioned in 1987 and served with the Soviet Navy and later the Russian Navy before being acquired by India.

The transformation of Vikramaditya INS into a state-of-the-art aircraft carrier involved significant upgrades and enhancements. The carrier’s flight deck was modified and expanded to accommodate various aircraft, including MiG-29K fighters, Kamov helicopters, and airborne early warning aircraft. Advanced aviation systems, arrestor gear, and catapult systems were installed to support carrier-based operations.

With a displacement of over 45,000 tons and a length of 284 meters, Vikramaditya INS is one of the largest and most powerful warships in the Indian Navy’s inventory. Its strategic capabilities extend beyond conventional warfare to include power projection, humanitarian assistance, disaster relief, and maritime security operations.

Vikramaditya INS plays a crucial role in India’s maritime defense posture, enhancing the country’s reach and presence in the Indian Ocean region. Its ability to deploy and sustain a mix of aircraft for various missions, including air defense, anti-submarine warfare, and reconnaissance, strengthens India’s deterrence capabilities and maritime dominance.

INS Karanj: Advancing Submarine Warfare

In contrast to the aircraft carrier prowess of Vikramaditya INS, INS Karanj represents India’s proficiency in submarine warfare and underwater capabilities. INS Karanj is a diesel-electric submarine of the Kalvari class, a variant of the French Scorpene-class submarines, designed and built in collaboration with Naval Group (formerly DCNS).

Commissioned in 2018, INS Karanj embodies cutting-edge submarine technology, stealth features, and advanced weapon systems. Its design optimizes acoustic signature reduction, making it less detectable by enemy sensors and enhancing its effectiveness in covert operations and anti-submarine warfare scenarios.

The submarine’s propulsion system, equipped with silent-running capabilities, allows for extended underwater endurance and stealthy maneuvering. INS Karanj is armed with torpedoes, anti-ship missiles, and mines, providing a potent offensive and defensive capability against surface vessels and submarines.

INS Karanj operates as part of India’s submarine fleet, which plays a critical role in strategic deterrence, intelligence gathering, maritime surveillance, and safeguarding vital sea lanes of communication. Its deployment enhances India’s maritime domain awareness and operational flexibility in both peacetime and conflict situations.

The submarine’s participation in naval exercises, patrols, and surveillance missions contributes to maritime security, anti-piracy efforts, and protection of India’s maritime interests. INS Karanj’s integration with other naval assets, including surface ships, aircraft, and maritime reconnaissance assets, enhances the Navy’s operational effectiveness and comprehensive maritime defense strategy.

Advancements in Indian Naval Capabilities

The inclusion of Vikramaditya INS and INS Karanj in India’s naval arsenal reflects the country’s commitment to modernizing its maritime forces, enhancing operational readiness, and strengthening national security. These assets, along with other naval platforms, form a cohesive and versatile maritime force capable of addressing a wide range of challenges and contingencies.

India’s naval modernization efforts encompass a spectrum of capabilities, including aircraft carriers, submarines, surface combatants, maritime patrol aircraft, and amphibious warfare vessels. Investments in indigenous shipbuilding, technology development, and international collaborations have propelled India’s naval capabilities to new heights.

The Indian Navy’s focus on blue-water operations, expeditionary capabilities, and strategic partnerships with friendly nations underscores its role as a stabilizing force in the Indian Ocean region and beyond. Vikramaditya INS and INS Karanj represent the culmination of years of planning, investment, and dedication to safeguarding India’s maritime interests and ensuring maritime security in an increasingly complex geopolitical environment.

Conclusion: Safeguarding Maritime Sovereignty

Vikramaditya INS and INS Karanj symbolize India’s maritime prowess, technological advancements, and strategic foresight in naval operations. As integral components of the Indian Navy’s fleet, these assets contribute to maritime security, defense preparedness, and regional stability.

The capabilities exhibited by Vikramaditya INS as an aircraft carrier and INS Karanj as a submarine demonstrate India’s multi-dimensional approach to maritime defense, encompassing power projection, deterrence, surveillance, and response capabilities. The synergy between these platforms, coupled with ongoing modernization initiatives, positions India as a key maritime player in the global arena.

As India continues to invest in naval capabilities, research and development, and international cooperation, its ability to safeguard maritime sovereignty, protect vital sea lanes, and respond effectively to emerging threats will be further strengthened. Vikramaditya INS and INS Karanj serve as tangible manifestations of India’s commitment to securing its maritime interests and contributing to a secure and stable maritime domain.

[navalpost]

Indian Navy commissions INS Karanj

Indian Navy commissions INS Karanj

Indian Navy commissioned the third Scorpene-class submarine INS Karanj in Mumbai on March 10th. The ship was commissioned in presence of Chief of Naval Staff Admiral Karambir Singh and Admiral (Retired) VS Shekhawat who was the Commanding Officer of the earlier INS Karanj during the 1971 India-Pakistan War, an Indian Navy statement said. Indian Navy has already inducted two submarines of the…

[defpost]

Indian Navy Commissions Its Second Scorpene-Class Submarine, INS Khanderi

#IndianNavy Commissions Its Second Scorpene-Class Submarine, #INSKhanderi.

The Indian Navy commissioned its second Scorpene/Kalvari-class diesel-electric attack submarine, INS Khanderi, during a ceremony held in Mumbai on Sept. 28.

The commissioning ceremony was attended by Defense Minister Rajnath Singh.

INS Khanderi was launched at the Mazagon Dock Limited (MDL) shipyard in Mumbai on Jan. 12, 2017 and started her sea trials on June 1 the same year. She was delivered…

[sabnews24x7]

The 5th Kalvari class submarine ‘INS Vagir’ has been inducted into the Indian Navy today in Mumbai. Read More

[civillearnings]

Scorpene-class submarine ‘INS Vela’

Vela, the fourth Scorpene class submarine, is equipped with advanced stealth features and has long range guided torpedoes as well as anti-ship missiles. The extremely potent submarine has state-of-the-art SONAR (sound navigation and ranging technology).

Indian Navy commissions fourth Scorpene-class submarine ‘INS Vela’. submarine ‘INS Vela’. To Strengthen the maritime arsenal. The Indian Navy commissioned nation’s fourth Scorpene-class submarine INS Vela at the naval dockyard in Mumbai. In the presence of the Chief of Naval Staff Admiral Karambir Singh. Built by Mazagon Dock Shipbuilders Ltd in collaboration with M/s Naval Group of France.…

[tezlivenews]

कराची पर नजरें गड़ाए थी 'भारतीय' पनडुब्‍बी कलावरी, चाहकर भी कुछ नहीं कर सका पाकिस्‍तान

कराची पर नजरें गड़ाए थी ‘भारतीय’ पनडुब्‍बी कलावरी, चाहकर भी कुछ नहीं कर सका पाकिस्‍तान

हाइलाइट्स पाकिस्‍तान के कराची बंदरगाह के पास द��खी पनडुब्‍बी की रक्षा विशेषज्ञों ने पहचान कर ली है विशेषज्ञों के मुताबिक यह पनडुब्‍बी भारत की हाल ही में शामिल की गई कलावरी हो सकती है उन्‍होंने बताया कि यह भारतीय पनडुब्‍बी कराची बंदरगाह से 150 समुद्री मील की दूरी पर थी इस्‍लामाबादपाकिस्‍तान के कराची बंदरगाह के पास दिखी पनडुब्‍बी की रक्षा विशेषज्ञों ने पहचान कर ली है। सबमरीन विशेषज्ञों के मुताबिक…

[ssbprep]

India’s Second Kalvari-Class Attack Sub to Be Commissioned This Month

India’s Second Kalvari-Class Attack Sub to Be Commissioned This Month

The Indian Navy will commission the second Scorpene-class (Kalvari-class) diesel-electric attack submarine (SSK), the future INS Khanderi, on September 28 during a ceremony at a shipyard in Mumbai under the auspices of Indian Defense Minister Rajnath Singh.

With the Indian Ministry of Defense’s (MoD) Project-75 acquisition program running five years behind schedule, this month’s commissioning…

[indianflash123]

INS Vagir to  Boost the Navy's Capability to Further India's Maritime Interests

INS Vagir, the fifth Kalvari class submarine was commissioned into the Indian Navy on January 23, 2023, the class of submarine that would boost the Indian Navy’s capability to further India’s maritime interests in deterring the enemy, and conducting Intelligence, Surveillance and Reconnaissance (ISR). The Mazagon Dock Shipbuilders Limited MDL) Mumbai, under collaboration with M/s Naval Group,…

[jenniferlinda76]

Arihant-Class Submarines: India's Maritime Security Vanguard

Maritime Security and Submarines of India: The Arihant Class

India, with its extensive coastline of over 7,500 kilometers, has a profound strategic interest in ensuring robust maritime security. The Indian Ocean, a crucial artery for global trade, is witnessing increasing geopolitical competition. Ensuring the safety and security of these waters is paramount for India, not only for national defense but also for economic stability. One of the critical components of India's maritime strategy is its submarine fleet, particularly the Arihant class, which plays a pivotal role in the nation's naval force.

The Importance of Maritime Security

Maritime security encompasses a wide array of concerns, including the protection of sea lines of communication (SLOCs), prevention of maritime terrorism, anti-piracy operations, and the safeguarding of offshore resources. For India, the Indian Ocean is not just a route for its international trade but also a strategic theater where it must counter various threats, ranging from piracy to the increasing naval presence of other powers like China.

India's strategic interests in the region are further complicated by its need to secure its Exclusive Economic Zone (EEZ), which spans over 2 million square kilometers, and its rich undersea resources. The Indian Navy, therefore, plays a crucial role in maintaining a balance of power in the region and ensuring a free and open maritime domain.

Evolution of India's Submarine Fleet

India's submarine fleet has evolved significantly since it commissioned its first Submarines of India, INS Kalvari, in 1967. The Indian Navy's submarine force consists of both conventional diesel-electric submarines and nuclear-powered submarines. Over the years, India has aimed to develop a credible underwater combat force capable of both defensive and offensive operations.

The acquisition and development of submarines have been guided by India's need to deter regional adversaries and project power within the Indian Ocean Region (IOR). The Indian Navy's submarine force includes the Kilo-class (Sindhughosh-class), HDW Type 209/1500 (Shishumar-class), Scorpene-class (Kalvari-class), and the indigenous Arihant-class nuclear-powered submarines.

The Arihant Class: India’s Nuclear Deterrent

The Arihant-class submarines represent a significant leap in India's naval capabilities. These submarines are the first nuclear-powered ballistic missile submarines (SSBNs) built by India, marking a critical component of India's strategic nuclear deterrent. The Arihant class is designed to provide India with a credible second-strike capability, ensuring that India can retaliate in the event of a nuclear attack, thereby maintaining a stable deterrence posture.

Development and Commissioning:

The development of the Arihant class began under the Advanced Technology Vessel (ATV) project, which was initiated in the 1980s. The project was shrouded in secrecy, with significant assistance from Russia in the form of technology transfer and technical expertise. INS Arihant, the lead vessel of the class, was launched in 2009 and commissioned into the Indian Navy in 2016.

Design and Capabilities:

The Arihant-class submarines are based on the Russian Akula-1 class design but have been modified to meet Indian requirements. These submarines are powered by an 83 MW pressurized water reactor, allowing them to remain submerged for extended periods, which is crucial for their role as a stealthy deterrent platform.

The submarines are equipped with K-15 Sagarika missiles, which have a range of about 750 kilometers, and the K-4 ballistic missiles, with a range of 3,500 kilometers. This enables the Arihant-class submarines to target adversaries well beyond India's borders, enhancing the strategic reach of the Indian Navy.

Operational Significance:

The primary role of the Arihant class is to provide a secure and survivable second-strike capability. In the event of a nuclear conflict, these submarines are designed to remain undetected in the vast expanse of the ocean, ready to launch a retaliatory strike if necessary. This capability is central to India's nuclear doctrine of "No First Use" and ensures that India can maintain a credible deterrent against its nuclear-armed neighbors.

The Strategic Role of the Indian Navy

The Indian Navy's strategic objectives are guided by the need to protect India's maritime interests and assert its influence in the Indian Ocean Region. The induction of the Arihant-class submarines is a testament to India's commitment to strengthening its naval capabilities and enhancing its strategic deterrence.

Power Projection:

With the Arihant-class submarines, India can project power far beyond its immediate neighborhood. The ability to launch nuclear missiles from the sea gives India a strategic advantage, allowing it to deter potential adversaries from undertaking aggressive actions. This power projection is not only a means of deterrence but also a way to establish India's role as a major player in regional and global security.

Maritime Diplomacy:

The presence of a strong and capable submarine force also plays a role in India's maritime diplomacy. By demonstrating its advanced capabilities, India can engage with other maritime nations on a more equal footing, fostering cooperation in areas such as counter-piracy, maritime domain awareness, and joint naval exercises. This helps to build alliances and partnerships that are essential for maintaining stability in the Indian Ocean Region.

Countering Regional Threats:

India faces several maritime threats, including the growing presence of the Chinese Navy in the Indian Ocean. The development of the Arihant-class submarines is a direct response to these challenges, providing India with a credible means to counterbalance the influence of other regional powers. The ability to operate stealthily and deliver powerful strikes ensures that India can protect its interests and maintain a strategic edge.

Future Prospects and Challenges

While the Arihant-class submarines mark a significant milestone, India continues to face challenges in further enhancing its submarine capabilities. The Indian Navy has plans to expand its SSBN fleet with the construction of additional Arihant-class submarines and the development of new, more advanced models.

Technological Advancements:

Future submarines are expected to feature advancements in stealth technology, longer-range missiles, and improved sensors and communication systems. These enhancements will be crucial in maintaining the effectiveness and survivability of India's underwater fleet in an increasingly contested maritime environment.

Industrial and Technological Hurdles:

Despite the progress made, India still faces hurdles in terms of indigenous development and production capabilities. Ensuring self-reliance in critical technologies and reducing dependence on foreign suppliers remain significant challenges. Addressing these issues will require sustained investment in research and development, as well as collaboration with international partners.

Strategic Imperatives:

As India continues to enhance its submarine capabilities, it must also focus on the broader strategic imperatives of maritime security. This includes strengthening its conventional naval forces, improving maritime domain awareness through enhanced surveillance and intelligence capabilities, and fostering regional cooperation to address shared security challenges.

Conclusion

The Arihant-class submarines represent a significant advancement in India's maritime security and strategic deterrence capabilities. As the cornerstone of India's underwater nuclear deterrent, these submarines enhance the Indian Navy's ability to protect the nation's maritime interests and project power in the Indian Ocean Region. The continued development and expansion of India's submarine fleet will be crucial in addressing the evolving security dynamics and maintaining stability in the region. As India navigates these challenges, the Arihant class stands as a testament to its commitment to achieving a credible and robust maritime defense posture.

[indianflashnews]

INS Vagir to  Boost the Navy's Capability to Further India's Maritime Interests

INS Vagir, the fifth Kalvari class submarine was commissioned into the Indian Navy on January 23, 2023, the class of submarine that would boost the Indian Navy’s capability to further India’s maritime interests in deterring the enemy, and conducting Intelligence, Surveillance and Reconnaissance (ISR). The Mazagon Dock Shipbuilders Limited MDL) Mumbai, under collaboration with M/s Naval Group,…

[navalpost]

India will Procure Heavy-weight Torpedos Indian Defence Ministry issued $291m tender for heavyweight torpedoes for Kalvari class submarines. Seeking to boost the Indian Navy's firepower, the Indian Defence Ministry has issued a tender worth over Rs 2000 crore (291m USD) for buying around 100 heavyweight torpedoes which would be equipped on the force's six Scorpene-class submarines being built at the Mumbai-based Mazagon dockyards.