₹449 Crore GNSS Jammers Contract for Indian Navy: Electronic Warfare and Aatmanirbhar Bharat Explained

On 10 June 2026, the Ministry of Defence signed a ₹449 crore contract with Accord Software and Systems Private Limited (ASSPL), Bengaluru, for the procurement of 20 Enhanced Capability Global Navigation Satellite System (ECGNSS) Jammers for the Indian Navy, with a minimum 75% indigenous content. The contract — inked in the presence of Defence Secretary Shri Rajesh Kumar Singh — falls under the Buy (Indian–Indigenously Designed, Developed and Manufactured) category, the most self-reliant procurement route in India's defence acquisition system.

The system can degrade an adversary's satellite-navigation signal acquisition and tracking, and perform signal spoofing (deceptive jamming) — letting Indian warships operate safely in a contested, multi-threat environment.

For NDA aspirants, this single contract opens up three high-yield topics: satellite navigation, electronic warfare, and India's defence-procurement framework.

What Is GNSS — and Why Jam It?

GNSS (Global Navigation Satellite System) is the umbrella term for satellite constellations that provide positioning, navigation and timing (PNT) anywhere on Earth. The major systems (worth memorising):

India's own system — NavIC (Navigation with Indian Constellation), formerly IRNSS, is a regional system of (originally) 7 satellites built by ISRO, covering India and ~1,500 km around it. It offers a Standard Positioning Service (civilian) and a Restricted Service (encrypted, for the military) — strategic autonomy in navigation so India is not dependent on the US-controlled GPS during conflict.

Why jamming matters militarily: modern weapons, ships, aircraft, missiles and drones rely on GNSS for navigation and guidance. If you can deny or deceive the enemy's GNSS, you blind their PNT: - Jamming = transmitting noise on GNSS frequencies to drown out the weak satellite signal, so the receiver loses its fix (denial) - Spoofing = transmitting fake but authentic-looking GNSS signals so the enemy receiver computes a false position/time (deception) — far more dangerous, because the target doesn't know it's been fooled

The Navy's ECGNSS jammers do both — degrading the adversary's acquisition/tracking AND spoofing. On a warship this protects against GNSS-guided anti-ship missiles and drones, and complicates enemy targeting.

Electronic Warfare (EW) — The Bigger Picture

GNSS jamming is one slice of Electronic Warfare, a recurring NDA GK theme. EW is the military use of the electromagnetic spectrum and has three classic divisions:

1. Electronic Attack (EA) — jamming, spoofing, directed-energy, anti-radiation missiles (offensive use of EM energy). GNSS jammers sit here.
2. Electronic Protection (EP) — protecting your own systems from enemy EA (frequency hopping, anti-jam antennas, encrypted military signals like NavIC's Restricted Service)
3. Electronic Support (ES) — detecting, intercepting and locating enemy emissions (signals intelligence, threat warning)

EW is central to modern naval warfare. Indian warships carry indigenous EW suites (e.g., the Shakti and Varuna EW systems by Bharat Electronics Limited). Control of the EM spectrum — 'spectrum dominance' — is now as important as firepower.

The Procurement Angle — Buy (Indian-IDDM)

This is the most exam-relevant policy thread. India's Defence Acquisition Procedure (DAP) 2020 ranks procurement categories by how indigenous they are. In descending order of self-reliance priority:

1. Buy (Indian-IDDM) — Indigenously Designed, Developed and Manufactured; highest priority; requires minimum indigenous content (50%+, here 75%). This contract.
2. Buy (Indian) — Indian vendor, indigenous content threshold, but design may be foreign
3. Buy and Make (Indian) — purchase + licensed manufacture in India via ToT
4. Buy and Make — partly imported, partly made in India
5. Buy (Global – Manufacture in India)
6. Buy (Global) — outright import; lowest priority

The IDDM category is the spearhead of Aatmanirbhar Bharat in defence — it means an Indian company designed the technology, not just assembled a foreign design. That a Bengaluru SME built warship-grade EW jammers is exactly the indigenisation story the government promotes.

Supporting Aatmanirbhar Bharat (defence) facts for NDA: - Positive Indigenisation Lists — DRDO/DMA notify lists of items banned from import (must be bought domestically); thousands of items across multiple lists - Defence exports crossed ₹21,000+ crore (record), up from a few hundred crore a decade ago - iDEX (Innovations for Defence Excellence) — funds start-ups/MSMEs to build defence tech (₹1.5 crore SPRINT grants etc.) - SRIJAN portal — indigenisation portal listing items for domestic vendors to develop - Two Defence Industrial Corridors — Uttar Pradesh and Tamil Nadu - Corporatisation of the Ordnance Factory Board (2021) into 7 Defence PSUs

The Indian Navy Context

The jammers strengthen the Navy's posture as a 'builder's navy' — over 65 warships/submarines are under construction in Indian yards. Quick NDA naval facts that pair with this: - Naval commands: Western (Mumbai), Eastern (Visakhapatnam), Southern (Kochi – training); plus the tri-service Andaman & Nicobar Command (Port Blair) - The Navy operates two aircraft carriers: INS Vikramaditya (ex-Russian, refurbished) and INS Vikrant (IAC-1, first indigenous carrier, commissioned 2022) - Chief of the Naval Staff heads the Navy; the Chief of Defence Staff (CDS) heads the integrated tri-service structure (HQ IDS) that, notably, co-runs the indigenisation effort behind contracts like this

NavIC in Depth — India's Strategic Navigation Asset

Because GNSS jamming and India's own satellite navigation are two sides of the same coin, NavIC deserves a closer look — it is a favourite NDA topic.

• NavIC (Navigation with Indian Constellation), earlier IRNSS (Indian Regional Navigation Satellite System), was conceived after the 1999 Kargil War, when the US reportedly denied India GPS data for the conflict zone — a wake-up call for navigational self-reliance.
• It is a regional (not global) system: a constellation of satellites in geostationary (GEO) and geosynchronous (GSO) orbits covering India and a region ~1,500 km around it.
• It offers two services: a Standard Positioning Service (SPS) for civilians and an encrypted Restricted Service (RS) for the military and authorised users.
• NavIC operates in the L5 and S bands — and newer satellites add the L1 band for compatibility with civilian devices and smartphones.
• Strategic value: in a conflict, India can rely on NavIC's military signal instead of the US-controlled GPS, and its encrypted signal is far harder for an adversary to jam or spoof than open GPS.

The lesson the jammer contract reinforces: owning your navigation system (NavIC) and being able to deny the enemy theirs (GNSS jammers) are complementary halves of navigational warfare.

Indian Naval Modernisation — Wider Context

The jammers fit a broader naval build-up that NDA aspirants should be able to sketch:

• Project 15B (Visakhapatnam-class destroyers) and Project 17A (Nilgiri-class stealth frigates) — indigenous surface combatants.
• Project 75 (Kalvari-class Scorpène submarines) built at Mazagon Dock with French ToT; Project 75I for next-gen submarines with Air-Independent Propulsion (AIP) — and DRDO's indigenous AIP module.
• INS Arihant-class — India's indigenous nuclear-powered ballistic missile submarines (SSBN), completing the nuclear triad (the ability to launch nuclear weapons from land, air and sea).
• BrahMos supersonic cruise missiles (India-Russia joint venture) deployed across ships.
• The Navy's stated goal of becoming fully Aatmanirbhar — designing and building its fleet in India — which contracts like the ₹449 crore EW jammer directly serve.

Electronic warfare jammers are the 'invisible' enabler that lets these expensive platforms survive and fight in a contested electromagnetic environment — which is why indigenous EW capability is treated as strategically vital.

Rapid Revision Q&A

Q: What does GNSS stand for, and name India's system? → Global Navigation Satellite System; India's regional system is NavIC (IRNSS), built by ISRO

Q: Difference between jamming and spoofing? → Jamming drowns the signal so the receiver loses its fix (denial); spoofing feeds fake signals so the receiver computes a false position (deception)

Q: Under which procurement category was the ₹449 crore jammer contract signed? → Buy (Indian-IDDM) — Indigenously Designed, Developed and Manufactured; highest-priority category under DAP 2020, here with 75% indigenous content

Q: What are the three divisions of Electronic Warfare? → Electronic Attack (EA), Electronic Protection (EP), Electronic Support (ES)

Q: Which navigation systems belong to the USA, Russia, EU and China respectively? → GPS (USA), GLONASS (Russia), Galileo (EU), BeiDou (China)

Q: What is iDEX? → Innovations for Defence Excellence — a scheme funding start-ups and MSMEs to develop defence technologies, part of Aatmanirbhar Bharat in defence

Q: Why was NavIC developed, and in which bands does it operate? → Conceived after GPS denial during the 1999 Kargil War for navigational self-reliance; operates in the L5 and S bands (newer satellites add L1); built by ISRO

Q: What completes India's nuclear triad at sea? → The INS Arihant-class SSBNs (nuclear-powered ballistic-missile submarines) — giving India sea-based nuclear launch capability alongside land and air

Q: Which Indian agencies/firms build the Navy's EW suites? → Primarily Bharat Electronics Limited (BEL) with DRDO — systems like Shakti and Varuna — and now private/MSME vendors under Buy (Indian-IDDM)

Defence technology and procurement policy are core NDA GK. Keep building your defence current affairs at NDA/CDS Current Affairs and prepare with serving-officer faculty at Cavalier Defence Academy's upcoming courses.

Source: Ministry of Defence PIB release, 10 June 2026 (PRID 2271094). Defence procurement and GNSS facts cross-verified.