The High Energy Materials Research Laboratory (HEMRL) has successfully handed over five indigenous Pyro Cartridges for underwater applications to the Indian Navy, marking a significant enhancement in India’s undersea warfare capabilities. This transfer, under a Development cum Production Partner (DcPP) model, will reduce import dependencies, particularly in light of increasing submarine competition in the Indo-Pacific region. The cartridges, designed for various applications such as torpedo ejection and submarine signaling, ensure reliability in extreme underwater conditions and align with the Navy’s transition towards eco-friendly munitions. Their integration into indigenous platforms like Scorpene submarines is expected to bolster India’s operational readiness and strategic deterrence, particularly against China’s expansive naval fleet, ultimately reinforcing India’s commitment to self-reliance in defense.