Europe
Scorpène-class
A Franco-Spanish diesel-electric attack submarine family with optional MESMA air-independent propulsion, exported to Chile, Malaysia, India, and Brazil, and the backbone of India's Kalvari and Brazil's Riachuelo classes.
China's primary conventional attack submarine with indigenous Stirling air-independent propulsion — a quiet, multi-week-endurance boat built for regional sea denial, and the platform behind Beijing's push into the submarine export market.
A Franco-Spanish diesel-electric attack submarine family with optional MESMA air-independent propulsion, exported to Chile, Malaysia, India, and Brazil, and the backbone of India's Kalvari and Brazil's Riachuelo classes.
Germany's pioneering fuel-cell AIP attack submarine — the ultra-quiet Type 212A, now evolving into the larger Type 212CD for North Atlantic/Arctic operations, operated by Germany, Italy and (on order) Norway.