India has achieved an important milestone in naval technology by producing domestic rubber tiles for submarines, a key feature for acoustic stealth. Mounted on the outer hull, these tiles make submarines harder to detect by minimizing sonar reflections and suppressing machinery noise. Their engineered multilayer structure includes cavities that absorb sound energy over different frequencies, weakening enemy active sonar while also reducing passive acoustic signatures. Proper installation is critical, as tiles must be securely bonded to treated steel hulls and sealed for durability under harsh underwater conditions. Standard units are roughly 980 mm by 980 mm, about 51 mm thick, and weigh nearly 51 kilograms each. Operationally, they deliver measurable reductions in transmitted and reflected sound, improving survivability during patrols and combat missions. Their lifespan can reach two decades, lowering replacement and maintenance demands. By indigenizing this sophisticated material science capability, India has advanced its submarine stealth ecosystem and strengthened broader self-reliance efforts in underwater warfare technologies.
