She joined the women's 'auxiliary'. [=a group of women who do work for a church, hospital, etc.]
a sailboat with an 'auxiliary' engine
an 'auxiliary' police force
(..) Are you okay? SAUCER should be free by now. I know, Mr. Sulu. The Captain should be there. The impulse engines drawing power from auxiliary generators. Captain. How many of the crew is still pod disposal? None. If I read this correctly... ...the intruders are taking them. (..)2016 Star Trek Beyond