The Battleship of the line （アレーク = Alaicec）(戦列艦 = Line of Battleship) provide the main longrange fire power of the fleets in the Seikai universe. They are the backbone of the navies. They belong to the larges ships in the fleet. Due to their size they are easy prey for small ships and always require guardships to escort and protect them.
As the battleships stay in the back, and provide a barrage or bombardment with mines as in ancient times, they are referred to as Battleship of the line. There are no battleships in the classical definition.