OVERVIEW: NavIC/IRNSS jammers are specialized electronic countermeasure systems designed to disrupt signals from India's regional satellite navigation system. They are deployed to degrade or deny positioning, navigation, and timing (PNT) services provided by the Indian Regional Navigation Satellite System (IRNSS), also known as NavIC.

GENERAL DESCRIPTION: These systems emit interference across the IRNSS signal bands—primarily the L5 band (1176.45 MHz) and S-band (2492.028 MHz)—to prevent receivers from acquiring or maintaining a lock on satellite signals. NavIC jammers may be stationary, mobile, or airborne, and can employ various techniques such as narrowband spot jamming, broadband barrage, or deception jamming. Advanced variants feature directional antennas and software-defined capabilities for selective and adaptive targeting. These jammers are used for both defensive operations (e.g., protection from PNT-guided munitions) and offensive electronic warfare to impair adversary navigation and timing.

ROLE SUMMARY:
Category: Navigation Warfare / Electronic Countermeasure
Primary Use: Degradation or denial of IRNSS/NavIC signals
Function: Active jamming (spot, barrage, or deceptive)
Platform: Ground vehicles, naval vessels, UAVs, or fixed installations
Integration: May operate standalone or as part of integrated EW suites

See Specific information under [Sensors/EW] and [Properties] sections.

SOURCE:
ISRO Technical Resources
https://en.wikipedia.org/wiki/Indian_Regional_Navigation_Satellite_System
Janes C4ISR & Mission Systems – Land/Naval/Air