Women have been permitted to serve on guided-missile submarines such as the USS Ohio since 2009. Now they will be able to serve on smaller submarines used for surveillance, reconnaissance and intelligence-gathering. (U.S. Navy photograph)

Women have been permitted to serve on guided-missile submarines such as the USS Ohio since 2009. Now they will be able to serve on smaller submarines used for surveillance, reconnaissance and intelligence-gathering. (U.S. Navy photograph)