Control Table High Angle Control System Gun data computer References External links Fire Control Fundamentals Manual for the Mark 1 and Mark 1a Computer Maintenance Manual for the Mark 1 Computer Manual for the Mark 6 Stable Element Gun Fire Control System Mark 37 Operating Instructions at ibiblio.org Director section of Mark 1 Mod 1 computer operations at NavSource.org Naval Ordnance and Gunnery, Vol. 2, Chapter 25, AA Fire Control Systems Artillery operation Mechanical computers Military computers Fire-control computers of World War II Military equipment introduced in the 1930s