Add Yahoo as a preferred source to see more of our stories on Google. The Cartagena shipyard of state-owned shipbuilding firm Navantia has begun the installation of the first air-independent ...

Here’s What You Need to Remember: Perhaps the U.S. Navy should not invest in conventional submarines. <p>Several navies&nbsp;<a href=”http://www.public.navy.mil ...

Here’s What You Need to Remember: One of the most crucial improvements in submarines of the postwar era is the air-independent propulsion (AIP) system. First fielded in the 1990s, the development ...

India's Project 75I submarines will use Air-Independent Propulsion (AIP), allowing them to remain underwater for weeks while ...