Talk:Federation/Ranks/@comment-2.220.58.42-20161009234434/@comment-83.86.56.71-20161126160408
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Because Post commander and Post Captain indicate the person has moved past the rank, however he/she is still being adressed by this rank.
So for instance i've been commander for a year. I then get promoted to Lt. and people still call me captain. That makes me a post captain