Interesting article regarding US Navy and thoughts of Diesel Electric Submarines.
"December 19, 2012: The U.S. Navy continues to debate the issue of just how effective non-nuclear submarines would be in wartime and whether the U.S. should buy some of these non-nuclear boats itself. This radical proposal is based on two compelling factors. First, the U.S. Navy may not get enough money to maintain a force of 40-50 SSNs (attack subs). Second, the quietness of modern diesel-electric boats puts nuclear subs at a serious disadvantage, especially in coastal waters. ........"