Massive 18-inch naval ordnance, disguised railway carriages, hidden Kent coastal emplacements, and the legendary British super-gun the Germans could never silence. Welcome to 7 Things German Spotters Never Located About Britain’s 18-Inch Boche Buster Railway Gun. In this fascinating World War I military history documentary, we explore the extraordinary engineering, tactical concealment, and sheer firepower behind the British Army’s most elusive railway heavy gun.