From Military.com
Besides the incoming officers from the academy, the first women submariners will include female supply corps officers at the department head level, Roughead said. The change will be phased in over time to include enlisted female sailors on the SSBN and SSGNs, he said. Women will be added to the Navy's SSN fast-attack submarines after necessary modifications can be determined, he said.
I don’t see how they can mod the 688s. Maybe Convert 9-man and add a head and shower? For those e-6 and below there is only 3 cans, 1 urinal, and 3 showers.
Female Officers on 688 could work. There’s space and a lockable head.