That 30 year 24 submarine plan was conceived in the vajpayee time. The plan at that time was to purchase half western submarine and rest half Russian submarine s so that MDL has gained expertise on both stealth and endurance technology of both design philosophy. After that we would have gained sufficient expertise for design and development of indegeneous diesel electric submarine. That was the plan. But things didn' t go as per plan. Firstly the scorpene class got excessively delayed. Secondly we developed our own indegeneous nuclear submarine arihant. Hence on the nuclear front our plan is 4-5 arihant class ssbn and 6 SSN . on diesel electric front we have p75i project of inducting 6 foreign submarine. After that we will have our indegeneous design.This process is likely to be completed in the next 10-15 years. The 30 year plan is a relic of the past.