During the 18th and 19th centuries, the British government used decommissioned warships to hold convicts and enemy detainees
The franchise has expanded across multiple platforms beyond the original visual novels: Prison Battleship prison battleship
The comic series Judge Dredd features the "Mega-City One Iso-Block 7," a space station shaped like a battleship. Similarly, the Warhammer 40,000 universe is filled with "Penal Legions" transported via repurposed Lunar-class cruisers—prison battleships in space. During the 18th and 19th centuries, the British