India

India’s Submarine Program Gets a Boost with INS Kalvari’s DRDO AIP Upgrade

The Indian Navy’s INS Kalvari, the first of the six Kalvari-class submarines, is set to undergo a major upgrade in mid-2024. The upgrade includes the installation of the indigenous Air Independent Propulsion (AIP) system developed by the Defense Research and Development Organization (DRDO). The AIP system will enable the submarine to stay submerged for longer

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