Under KEY TECHNOLOGY AREAS, let’s look at Propulsion

Propulsion improvements being marketed range from extended-life batteries to air-independent propulsion systems that give submarines the ability to remain submerged and undetected for extended periods of time without having to snorkel to recharge their batteries.

The French submarine construction for instance, is using their MESMA air-independent propulsion system.

Advanced quieting technologies are being used to make new submarines more stealthy, and high-strength steels are being used to extend depth limits and improve survivability. New, computerized combat systems may offer the greatest improvement in diesel submarine capabilities, as automation permits consolidation for fire control, sonar and weapons system functions to make inexperienced crews more competitive.

The Japanese HARUSHIO Class diesel submarine is using high-strength steel for deeper diving.