Editing Skipjack-class submarine (section)

==Service==
''Skipjack'' was authorized in the FY 1956 new construction program and commissioned in April 1959. Each hull cost around $40 million. ''Skipjack'' was certified as the "world's fastest submarine" after initial sea trials in March 1959, although the actual speed attained was classified. The ''Skipjack''s remained the fastest US nuclear-powered submarines until the first of the [[Los Angeles-class submarine|''Los Angeles'' class]] entered service in 1974. This was due to the increased size of the ''Thresher'' and ''Sturgeon'' classes, which retained ''Skipjack''{{'}}s S5W power plant, plus the introduction of the ''skewback'' screw, which was quiet but mechanically inefficient.<ref>Friedman, pp. 142-143</ref> The ''Skipjack''s saw service during the [[Vietnam War]] and most of the [[Cold War]]. The ''Skipjack''-class submarines were withdrawn from service in the late 1980s and early 1990s except for {{USS|Scorpion|SSN-589|2}}, which sank on 22 May 1968 southwest of the [[Azores]] while returning from a [[Mediterranean]] deployment, with all 99 crewmembers lost.<ref>[http://www.oneternalpatrol.com/post-wwii-boats.htm On Eternal Patrol postwar page including ''Scorpion'']</ref>