Ruth Bailey Kelly has finally started her Nautical Training and is assigned to the battleship Colorado. She must learn her way around her ship, her crew, and the sea. Training progresses smoothly until Colorado finds itself in a position no Standard-type battleship should ever be in...

Dominion Girl's High School is a minor American-themed school based on the school ship Nassau. Their once-active Tankery team has since fallen into neglect. In order to compete with their old rival, Dominion recruits several exchange students to bring the team back up to speed. Can they pull the team to its former glory and bring Dominion back out from the shadows?