Spain and Germany completed AIP system trials for the Indian Navy's ₹43,000-crore submarines. TKMS, using new fuel cells, showcased a stealthy German 212 submarine. Navantia displayed components and conducted battery-charging trials. TKMS partners with Mazagon Dockyards; Navantia with Larsen & Toubro. Khalil Rehman confirmed tests. Indian Navy evaluates reports; future integration is planned.
