Now that India is getting experience in submarine building technology (nuclear) as well as long range ballistic missiles India should go for Soviet based legacy submarines such as Project 941 or in NATO terms Typhoon class submarine (depending on the budget). Advantages: 1. Ballistic missile submarines are designed for stealth, to avoid detection at all costs. Nuclear power, allowing almost the entire patrol to be conducted submerged, is of great importance to this. They also use many sound-reducing design features, such as anechoic tiles on their hull surfaces, carefully designed propulsion systems, and machinery mounted on vibration-damping mounts. 2. The invisibility and mobility of SSBNs offer a reliable means of deterrence against an attack (by maintaining the threat of a second strike), as well as a potential surprise first strike capability. 3. A typhoon class submarine can carry up to twenty intercontinental ballistic missiles carrying as many as two hundred independently targeted warheads (ten warheads per missile). 4. Since the retirement of the last Royal Air Force WE.177 nuclear bomb in 1998, the British nuclear system has been wholly submarine-based. This is intended to deter a potential enemy because they cannot ensure eliminating the entire stockpile in a first strike if a ballistic missile submarine remains undetected. 5. Beijing will command a significant coercive advantage as the PLA Navy’s first serious SSBN fleet enters service. Whether smaller Asian powers would bandwagon with China, combine to balance against it, or make other arrangements remains to be determined. 6. The Indian Navy’s fitful progress at constructing submarine-launched ballistic missiles — range limitations in particular — promises to compel New Delhi to send SSBNs into the China seas to establish sea-based deterrence vis-à-vis Beijing. The presence of Indian missile boats in these waters — waters China considers a nautical preserve — could prove an effective deterrent against any Chinese misadventures (though India has a no-first use policy on nuclear weapons).