There are no remaining legal barriers to women serving on Naval submarines, and this CSMonitor article defends plans for the reversal of Navy policy on the issue, despite some public hysteria regarding women and military service.
Historically, attempts to exclude citizens based on gender or race have been ultimately unsuccessful. But the issue here is more than just a demand for gender equality. Navy recruitment is cyclical. Prohibiting women from serving aboard submarines not only limits their Navy career potential, it also limits the Navy, which has a limited talent pool of nuclear-trained service personnel.
Women make up 15 percent of the Navy. And there is a need for more nuclear-trained recruits who can serve on subs. “We know there are capable young women in the Navy and women who are interested in the Navy who have the talent and desire to succeed in the submarine force,” said Lt. Justin Cole, a Navy spokesman. “Enabling them to serve there is best for the submarine force and our Navy.”
Countries that allow women to serve as submariners include Australia, Canada, Norway, and Sweden. Sounds like a non-issue to me.