Yeah, and replace commander with commanderess while we're at it.
Protip: equality is not about being special, it's about being equal. Ranks have no gender for that matter. Again, look at current ranks in armies and navies.
Again with referring to organisations that are historically quite sexist. Here: http://en.wikipedia.org/wiki/Women_in_the_military These comments like "Oh, just look at tradition and history and do whatever has been done before" are such ludicrous nonsense. You lot think there's more fairness to calling a woman "sir" if she's not allowed to serve where the poor, unequal men do? Again, for the nth time, "baroness" is a word. A known word. A common word. "Commanderess" is not common and would likely not be recognised as a valid word by most. "Baron" is also a common, known word. Known as being the male equivalent to "baroness." I don't know how to make any of this more clear. Please, no more nonsense made up on the spot just for the sake of telling somebody off.
Additional point: as has also been previously mentioned, the Empire uses titles rather than military style ranks. You're saying "Look, militaries use different words in different ways, so this thing is completely fine!" as if that makes any sense.