During 1990â2003, Pakistan sustained its historical lead as the second-most urbanized nation in South Asia with city dwellers making up 36% of its population. Furthermore, 50% of Pakistanis now reside in towns of 5,000 people or more.
Submarine Propulsion Systems. During World War II, most American submarines were powered by diesel-electric systems. This was a departure from earlier submarine power systems, which were direct drive types, little changed from the earliest boats. In this direct-drive power system, the diesel engine is directly connected to the propeller shaft.
As a follow-up to my previous article âWhat to Expect from Russiaâs Pacific Fleet in 2014,â I would like to take a closer look at Russiaâs new backbone of its maritime nuclear deterrence â the Borei-class (aka Dolgorukiy-class), Project 955, fourth generation SSBN (Ship, Submersible, Ballistic, Nuclear) submarine.